{"id":145099,"date":"2026-05-11T15:11:28","date_gmt":"2026-05-11T13:11:28","guid":{"rendered":"https:\/\/xometry.pro\/?post_type=articles&#038;p=145099"},"modified":"2026-05-12T16:32:32","modified_gmt":"2026-05-12T14:32:32","slug":"first-angle-third-angle-projection","status":"publish","type":"articles","link":"https:\/\/xometry.pro\/en\/articles\/first-angle-third-angle-projection\/","title":{"rendered":"First Angle vs. Third Angle Projection: What\u2019s the Difference?"},"content":{"rendered":"<div role=\"navigation\" aria-label=\"Table of Contents\" class=\"simpletoc wp-block-simpletoc-toc\"><h2 class=\"simpletoc-title\">Table of Contents<\/h2>\n<ul class=\"simpletoc-list\">\n<li><a href=\"#h-what-is-orthographic-projection\">What Is Orthographic Projection?<\/a>\n\n<\/li>\n<li><a href=\"#h-first-vs-third-angle-projection-the-quadrants\">First vs. Third Angle Projection: The Quadrants<\/a>\n\n<\/li>\n<li><a href=\"#first-angle-projection-iso-standard\">First Angle Projection (ISO Standard)<\/a>\n\n<\/li>\n<li><a href=\"#third-angle-projection-asme-standard\">Third Angle Projection (ASME Standard)<\/a>\n\n<\/li>\n<li><a href=\"#comparing-the-standard-views\">Comparing the Standard Views<\/a>\n\n\n<\/li>\n\n<\/li>\n\n<\/li>\n\n<\/li>\n\n<\/li>\n\n<\/li>\n\n<li><a href=\"#the-choice\">The Choice<\/a>\n<\/li><\/ul><\/div>\n\n\n<p>Whether detailing basic measurements or complex <a href=\"https:\/\/xometry.pro\/en\/articles\/geometric-dimensioning-and-tolerancing-gdt\/\">Geometric Dimensioning and Tolerancing,<\/a> both methods convey the exact same manufacturing information, but they place the orthographic views in opposite positions on the drawing sheet.<\/p>\n\n\n\n<p>Understanding the logic behind both methods is important to avoid confusion, especially when working with international partners.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-what-is-orthographic-projection\"><strong>What Is Orthographic Projection?<\/strong><\/h2>\n\n\n\n<p>If you try to dimension a 3D isometric model directly on a 2D piece of paper, the perspective is distorted. Because only horizontal and vertical lines remain true to size, you cannot use the drawing&#8217;s denoted scale to measure angled lines. Therefore, adding standard manufacturing dimensions and tolerances to isometric views is impractical and inaccurate.<\/p>\n\n\n\n<p>Instead, engineers project the necessary faces of a part onto flat planes. There are two primary projection planes: <strong>horizontal<\/strong> and <strong>vertical<\/strong>. These flat, 2D representations are known as <strong>orthographic projections<\/strong> (or dihedral projections in some regions).<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"1024\" height=\"544\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/3D-objects-translate-into-standard-2D-orthographic-views-1024x544.png\" alt=\"Diagram of a 3D mechanical engine part inside a transparent box, demonstrating how projection lines create 2D Front, Top, and Right Side views.\" class=\"wp-image-147192\" style=\"max-width:600px\" srcset=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/3D-objects-translate-into-standard-2D-orthographic-views-1024x544.png 1024w, https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/3D-objects-translate-into-standard-2D-orthographic-views-300x159.png 300w, https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/3D-objects-translate-into-standard-2D-orthographic-views-768x408.png 768w, https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/3D-objects-translate-into-standard-2D-orthographic-views.png 1415w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/3D-objects-translate-into-standard-2D-orthographic-views.png\" data-fancybox=\"gallery-145099\" data-caption=\"The &quot;Glass Box&quot; concept illustrates how 3D objects translate into standard 2D orthographic views for manufacturing.\" aria-label=\"Open full image\"><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/3D-objects-translate-into-standard-2D-orthographic-views.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><figcaption class=\"wp-element-caption\">The &#8220;Glass Box&#8221; concept illustrates how 3D objects translate into standard 2D orthographic views for manufacturing.<\/figcaption><\/figure>\n\n\n\n<p>A complete orthographic drawing can include up to six standard views. The vertical plane captures the <strong>front, back, and side views<\/strong>, while the horizontal plane captures the <strong>top and bottom views<\/strong>.<\/p>\n\n\n\n<p>By placing the object between the observer and the projection plane, looking at it from different directions creates flat projections that show the true dimensions without perspective distortion.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"416\" height=\"472\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/orthographic-projection-principles.png\" alt=\"3D CAD model of a machined part used to demonstrate orthographic projection principles.\" class=\"wp-image-147204\" style=\"max-width:300px\" srcset=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/orthographic-projection-principles.png 416w, https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/orthographic-projection-principles-264x300.png 264w\" sizes=\"(max-width: 416px) 100vw, 416px\" \/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/orthographic-projection-principles.png\" data-fancybox=\"gallery-145099\" data-caption=\"A 3D part example used to explain how views are positioned in first and third angle projection.\" aria-label=\"Open full image\"><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/orthographic-projection-principles.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><figcaption class=\"wp-element-caption\">A 3D part example used to explain how views are positioned in first and third angle projection.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-first-vs-third-angle-projection-the-quadrants\"><strong>First vs. Third Angle Projection: The Quadrants<\/strong><\/h2>\n\n\n<div class=\"custom-table-block \" id=\"table-id-243\" >\r\n\t<div class=\"search-input-wrapper\">\r\n\t\t<svg width=\"16\" height=\"16\" viewBox=\"0 0 16 16\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\r\n\t\t\t<path d=\"M15.7812 13.833L12.6659 10.7177C12.5252 10.5771 12.3346 10.499 12.1347 10.499H11.6253C12.4877 9.39596 13.0002 8.00859 13.0002 6.49937C13.0002 2.90909 10.0911 0 6.50083 0C2.91056 0 0.00146484 2.90909 0.00146484 6.49937C0.00146484 10.0896 2.91056 12.9987 6.50083 12.9987C8.01006 12.9987 9.39742 12.4863 10.5004 11.6239V12.1332C10.5004 12.3332 10.5786 12.5238 10.7192 12.6644L13.8345 15.7797C14.1282 16.0734 14.6032 16.0734 14.8938 15.7797L15.778 14.8954C16.0718 14.6017 16.0718 14.1267 15.7812 13.833ZM6.50083 10.499C4.29167 10.499 2.50122 8.71165 2.50122 6.49937C2.50122 4.29021 4.28855 2.49976 6.50083 2.49976C8.70999 2.49976 10.5004 4.28708 10.5004 6.49937C10.5004 8.70852 8.71311 10.499 6.50083 10.499Z\" fill=\"#476175\"\/>\r\n\t\t<\/svg>\r\n\t\t<input type=\"search\" class=\"table-search-input\" id=\"table-search-243\" placeholder=\"Table search\">\r\n\t<\/div>\t\r\n\t<div class=\"table-wrapper\">\r\n\t\t<table style=\"border-collapse: collapse; width: 100%; height: 96px;\">\n<tbody>\n<tr>\n<td style=\"width: 22.2938%;\"><b>Feature<\/b><\/td>\n<td style=\"width: 39.0464%;\"><b>First Angle Projection<\/b><\/td>\n<td style=\"width: 38.6598%;\"><b>Third Angle Projection<\/b><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 22.2938%;\"><span style=\"font-weight: 400;\">Standard<\/span><\/td>\n<td style=\"width: 39.0464%;\"><span style=\"font-weight: 400;\">ISO 128<\/span><\/td>\n<td style=\"width: 38.6598%;\"><span style=\"font-weight: 400;\">ASME Y14.3<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 22.2938%;\"><span style=\"font-weight: 400;\">Common Regions<\/span><\/td>\n<td style=\"width: 39.0464%;\"><span style=\"font-weight: 400;\">Europe, Asia, India<\/span><\/td>\n<td style=\"width: 38.6598%;\"><span style=\"font-weight: 400;\">USA, Canada, Australia<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 22.2938%;\"><span style=\"font-weight: 400;\">Projection Logic<\/span><\/td>\n<td style=\"width: 39.0464%;\"><span style=\"font-weight: 400;\">Object between observer and plane<\/span><\/td>\n<td style=\"width: 38.6598%;\"><span style=\"font-weight: 400;\">Plane between observer and object<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 22.2938%;\"><span style=\"font-weight: 400;\">Top View Position<\/span><\/td>\n<td style=\"width: 39.0464%;\"><span style=\"font-weight: 400;\">Below front view<\/span><\/td>\n<td style=\"width: 38.6598%;\"><span style=\"font-weight: 400;\">Above front view<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 22.2938%;\"><span style=\"font-weight: 400;\">Left View Position<\/span><\/td>\n<td style=\"width: 39.0464%;\"><span style=\"font-weight: 400;\">Right side<\/span><\/td>\n<td style=\"width: 38.6598%;\"><span style=\"font-weight: 400;\">Left side<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 22.2938%;\"><span style=\"font-weight: 400;\">Right View Position<\/span><\/td>\n<td style=\"width: 39.0464%;\"><span style=\"font-weight: 400;\">Left side<\/span><\/td>\n<td style=\"width: 38.6598%;\"><span style=\"font-weight: 400;\">Right side<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 22.2938%;\"><span style=\"font-weight: 400;\">Intuitiveness<\/span><\/td>\n<td style=\"width: 39.0464%;\"><span style=\"font-weight: 400;\">Less intuitive (initially)<\/span><\/td>\n<td style=\"width: 38.6598%;\"><span style=\"font-weight: 400;\">More intuitive<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\t<\/div>\r\n<\/div>\r\n<style>\r\n\t.custom-table-block table{\r\n\t\theight: initial!important;\r\n\t}\r\n\t.search-input-wrapper{\r\n\t\tposition: relative;\r\n\t\tmargin-bottom: 24px;\r\n\t}\r\n\t.search-input-wrapper svg{\r\n\t\tposition: absolute;\r\n\t\ttop:50%;\r\n\t\tleft:12px;\r\n\t\ttransform: translateY(-50%);\r\n\t}\r\n\t.table-search-input{\r\n\t\tpadding: 0 0 0 40px;\r\n\t\tborder:1px solid #C1CAD1;\r\n\t\theight: 44px;\r\n\t\twidth: 201px;\r\n\t\tcolor:#092C47;\r\n\t\tfont-family: Open Sans;\r\n\t\tfont-size: 16px;\r\n\t\tfont-weight: 400;\r\n\t\tline-height: 24px;\r\n\t\tletter-spacing: 0em;\r\n\t\ttext-align: left;\r\n\t}\r\n\t.table-search-input::placeholder{\r\n\t\tcolor:#092C47;\r\n\t}\r\n\t\r\n\t.custom-table-block thead th{\r\n\t\ttext-align: left;\r\n\t\twhite-space:nowrap;\r\n\t}\r\n\t\r\n\t.custom-table-block thead{\r\n\t\tmargin-bottom: 14px;\r\n\t}\r\n\r\n\t.custom-table-block tbody tr:nth-child(odd){\r\n\t\tbackground-color: #F6F9FF;\r\n\t}\r\n\r\n\t.custom-table-block tbody, .custom-table-block thead, .custom-table-block tr, .custom-table-block td, .custom-table-block th{\r\n\t\theight: initial!important;\r\n\t}\r\n\t\r\n\t.custom-table-block tbody td{\r\n\t\tcolor:#092C47;\r\n\t\tfont-family: Open Sans;\r\n\t\tfont-size: 16px;\r\n\t\tfont-weight: 400;\r\n\t\tline-height: 24px;\r\n\t\tletter-spacing: 0em;\r\n\t\ttext-align: left;\r\n\t\tpadding: 7px;\r\n\t}\r\n\t\r\n\t.custom-table-block thead th{\r\n\t\tfont-family: Open Sans;\r\n\t\tfont-size: 16px;\r\n\t\tfont-weight: 700;\r\n\t\tline-height: 24px;\r\n\t\tletter-spacing: 0em;\r\n\t\ttext-align: left;\r\n\t\tcolor:#092C47;\r\n\t\tposition: relative;\r\n\t}\r\n\t.custom-table-block thead th:after{\r\n\t\tcontent:\"\";\r\n\t\tdisplay: inline-block;\r\n\t\tbackground-image: url(\"data:image\/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http:\/\/www.w3.org\/2000\/svg'%3E%3Cpath d='M10.585 0.585938L6 5.17094L1.415 0.585938L0 2.00094L6 8.00094L12 2.00094L10.585 0.585938Z' fill='%23476175'\/%3E%3C\/svg%3E%0A\");\r\n\t\tmargin-left: 8px;\r\n\t\tbackground-position: center center;\r\n\t\tbackground-size: 12px 7.5px;\r\n\t\tbackground-repeat: no-repeat;\r\n\t\twidth: 24px;\r\n\t\theight: 12px;\r\n\t}\r\n\t.custom-table-block{\r\n\t\tmargin: 20px 0;\t\r\n\t}\r\n\t.custom-table-block .table-wrapper{\r\n\t\twidth: 100%;\r\n\t\toverflow-x: auto;\r\n\t}\r\n\t@media(max-width: 768px){\r\n\t\t\/* .custom-table-block tbody td{\r\n\t\t\twhite-space: nowrap;\r\n\t\t} *\/\r\n\t\t.custom-table-block .table-wrapper{\r\n\t\t\tmax-width: calc(100vw - 16px);\r\n\t\t}\r\n\t}\r\n<\/style>\r\n\n\n\n<p>To understand how the views are arranged, imagine the vertical and horizontal projection planes intersecting to create four possible quadrants.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>First Angle Projection:<\/strong> The 3D model sits in the <strong>first quadrant<\/strong>.<\/li>\n\n\n\n<li><strong>Third Angle Projection:<\/strong> The 3D model sits in the <strong>third quadrant<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p>For <a href=\"https:\/\/xometry.pro\/en\/articles\/prepare-technical-drawing\/\">engineering drawing<\/a> purposes, these two planes are conceptually &#8220;folded flat&#8221; so that all the views can be printed on a single 2D sheet of paper.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"1024\" height=\"652\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/vertical-and-horizontal-planes-1024x652.png\" alt=\"A 3D diagram showing intersecting vertical and horizontal planes dividing space into four labeled quadrants with arrows indicating rotation.\" class=\"wp-image-147216\" style=\"max-width:600px\" srcset=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/vertical-and-horizontal-planes-1024x652.png 1024w, https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/vertical-and-horizontal-planes-300x191.png 300w, https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/vertical-and-horizontal-planes-768x489.png 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/vertical-and-horizontal-planes.png\" data-fancybox=\"gallery-145099\" data-caption=\"A fundamental diagram showing the vertical and horizontal planes forming four quadrants for engineering projection.\" aria-label=\"Open full image\"><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/vertical-and-horizontal-planes.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><figcaption class=\"wp-element-caption\">A fundamental diagram showing the vertical and horizontal planes forming four quadrants for engineering projection.<\/figcaption><\/figure>\n\n\n\n<p>Why don&#8217;t we use the <strong>second and fourth angles<\/strong>?&nbsp;<\/p>\n\n\n\n<p>In practice, they are useless. If you place an object in the second or fourth quadrant and fold the planes flat, the vertical and horizontal views project onto the exact same location, overlapping each other and making the drawing unreadable.<\/p>\n\n\n\n<h2 id=\"first-angle-projection-iso-standard\" class=\"wp-block-heading\"><strong>First Angle Projection (ISO Standard)<\/strong><\/h2>\n\n\n\n<p>First angle projection is the dominant standard in <strong>Europe, India, and most of Asia<\/strong>, and is defined by the <a href=\"https:\/\/www.iso.org\/standard\/83356.html\" target=\"_blank\" rel=\"noreferrer noopener\">ISO 128-3<\/a> standard.<\/p>\n\n\n\n<p>In first angle projection, the object is situated <strong>between the observer and the projection plane<\/strong>.<\/p>\n\n\n\n<p>While some consider this method slightly less intuitive, the logic is simple: Imagine an object sitting on your desk. The side facing you is the <strong>Front View<\/strong>, which acts as the anchor for the drawing.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>If you flip the object downward, you see the top. Therefore, the <strong>Top View<\/strong> is placed <em>below<\/em> the Front View.<\/li>\n\n\n\n<li>If you flip the object to the right, you see the left side. Therefore, the <strong>Left Side View<\/strong> is placed on the <em>right<\/em> of the Front View.<\/li>\n<\/ul>\n\n\n\n<p><strong>The Rule of First Angle:<\/strong> Views are projected onto the <em>opposite<\/em> side of where you are looking.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"398\" height=\"258\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/first-angle-projection.png\" alt=\"\" class=\"wp-image-147228\" srcset=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/first-angle-projection.png 398w, https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/first-angle-projection-300x194.png 300w\" sizes=\"(max-width: 398px) 100vw, 398px\" \/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/first-angle-projection.png\" data-fancybox=\"gallery-145099\" data-caption=\"\" aria-label=\"Open full image\"><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/first-angle-projection.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p><strong>The Symbol:<\/strong> Every engineering drawing indicates its projection method in the title block. The first angle projection symbol shows the side and top views of a truncated cone, with the cone&#8217;s wider base facing <em>toward<\/em> the top view.<\/p>\n<\/div>\n<\/div>\n\n\n\n<h2 id=\"third-angle-projection-asme-standard\" class=\"wp-block-heading\"><strong>Third Angle Projection (ASME Standard)<\/strong><\/h2>\n\n\n\n<p>Third angle projection (often called the American projection system) is the standard used in the <strong>United States, Canada, Japan, and Australia<\/strong>. It is defined by the <a href=\"https:\/\/www.asme.org\/codes-standards\/find-codes-standards\/y14-3-orthographic-pictorial-views\" target=\"_blank\" rel=\"noreferrer noopener\">ASME Y14.3<\/a> standard.<\/p>\n\n\n\n<p>In third angle projection, the <strong>projection plane sits between the observer and the object<\/strong> (imagine looking through a transparent glass box at the part inside).<\/p>\n\n\n\n<p>Because the projection plane is in front of the object, the views are located on the <em>exact same side<\/em> as the direction you are looking from.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Look at the top of the object, and you draw the <strong>Top View<\/strong> <em>above<\/em> the Front View.<\/li>\n\n\n\n<li>Look at the right side of the object, and you draw the <strong>Right Side View<\/strong> on the <em>right<\/em>.<\/li>\n<\/ul>\n\n\n\n<p><strong>The Rule of Third Angle:<\/strong> Views are projected onto the <em>same<\/em> side from which you are looking. Most modern engineers consider this layout to be highly intuitive.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"398\" height=\"258\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/third-angle-projectio.png\" alt=\"\" class=\"wp-image-147240\" srcset=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/third-angle-projectio.png 398w, https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/third-angle-projectio-300x194.png 300w\" sizes=\"(max-width: 398px) 100vw, 398px\" \/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/third-angle-projectio.png\" data-fancybox=\"gallery-145099\" data-caption=\"\" aria-label=\"Open full image\"><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/third-angle-projectio.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p><strong>The Symbol:<\/strong> The third angle projection symbol shows two concentric circles with the smaller diameter of the side view facing <em>away<\/em> from the top view.<\/p>\n<\/div>\n<\/div>\n\n\n\n<h2 id=\"comparing-the-standard-views\" class=\"wp-block-heading\"><strong>Comparing the Standard Views<\/strong><\/h2>\n\n\n\n<p>Let&#8217;s walk through the main orthographic views to see the practical differences side by side.<\/p>\n\n\n\n<h3 id=\"front-view\" class=\"wp-block-heading\"><strong>Front View<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"327\" height=\"306\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/front-view-projection.png\" alt=\"Front view from a technical drawing\" class=\"wp-image-147252\" style=\"max-width:300px\" srcset=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/front-view-projection.png 327w, https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/front-view-projection-300x281.png 300w\" sizes=\"(max-width: 327px) 100vw, 327px\" \/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/front-view-projection.png\" data-fancybox=\"gallery-145099\" data-caption=\"Front view from a technical drawing\" aria-label=\"Open full image\"><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/front-view-projection.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><figcaption class=\"wp-element-caption\">Front view from a technical drawing<\/figcaption><\/figure>\n\n\n\n<p>The front view is the starting point for any orthographic drawing. It should be chosen to showcase the most characteristic or functional features of the part, usually capturing the general length and height. Because it serves as the base for all other projections, <strong>the front view is positioned the exact same way in both first and third angle projection.<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-side-view\"><strong>Side View<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"464\" height=\"453\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/side-view-first-thrid-angle.png\" alt=\"The image above depicts the first angle projection above, and the third angle below.\" class=\"wp-image-147264\" style=\"max-width:500px\" srcset=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/side-view-first-thrid-angle.png 464w, https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/side-view-first-thrid-angle-300x293.png 300w\" sizes=\"(max-width: 464px) 100vw, 464px\" \/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/side-view-first-thrid-angle.png\" data-fancybox=\"gallery-145099\" data-caption=\"The image above depicts the first angle projection above, and the third angle below.\" aria-label=\"Open full image\"><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/side-view-first-thrid-angle.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><figcaption class=\"wp-element-caption\">The image above depicts the first angle projection above, and the third angle below.<\/figcaption><\/figure>\n\n\n\n<p>The side view adds information about depth, something the front view cannot convey. In this example, the left side view reveals the position of the legs, the depth of the part, the angle and size of the chamfer. Either a section view or hidden lines would be needed to dimension the depth of the slot.<\/p>\n\n\n\n<h3 id=\"top-view\" class=\"wp-block-heading\"><strong>Top view<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"480\" height=\"434\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/top-view-first-thrid-angle.png\" alt=\"First angle projection is on the left and third angle on the right of the division line.\" class=\"wp-image-147276\" style=\"max-width:500px\" srcset=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/top-view-first-thrid-angle.png 480w, https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/top-view-first-thrid-angle-300x271.png 300w\" sizes=\"(max-width: 480px) 100vw, 480px\" \/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/top-view-first-thrid-angle.png\" data-fancybox=\"gallery-145099\" data-caption=\"First angle projection is on the left and third angle on the right of the division line.\" aria-label=\"Open full image\"><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/top-view-first-thrid-angle.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><figcaption class=\"wp-element-caption\">First angle projection is on the left and third angle on the right of the division line.<\/figcaption><\/figure>\n\n\n\n<p>The top view shows features visible from above. In this example, the top face has no features. So it would be sensible to exclude the view from the main drawing to minimize clutter.<\/p>\n\n\n\n<h3 id=\"bottom-view\" class=\"wp-block-heading\"><strong>Bottom view<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"499\" height=\"380\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/bottom-view-first-thrid-angle.png\" alt=\"First angle projection on the left, third angle on the right.\" class=\"wp-image-147288\" style=\"max-width:500px\" srcset=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/bottom-view-first-thrid-angle.png 499w, https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/bottom-view-first-thrid-angle-300x228.png 300w\" sizes=\"(max-width: 499px) 100vw, 499px\" \/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/bottom-view-first-thrid-angle.png\" data-fancybox=\"gallery-145099\" data-caption=\"First angle projection on the left, third angle on the right.\" aria-label=\"Open full image\"><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/bottom-view-first-thrid-angle.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><figcaption class=\"wp-element-caption\">First angle projection on the left, third angle on the right.<\/figcaption><\/figure>\n\n\n\n<p>The bottom view reveals under-side features. For example, if a part has cylindrical feet, the front view might just show rectangular blocks, but the bottom view will reveal their true circular profile.<\/p>\n\n\n\n<h3 id=\"auxiliary-views\" class=\"wp-block-heading\"><strong>Auxiliary views<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"467\" height=\"462\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/auxiliary-views-first-thrid-angle.png\" alt=\"Auxiliary views\" class=\"wp-image-147300\" style=\"max-width:500px\" srcset=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/auxiliary-views-first-thrid-angle.png 467w, https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/auxiliary-views-first-thrid-angle-300x297.png 300w, https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/auxiliary-views-first-thrid-angle-84x84.png 84w, https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/auxiliary-views-first-thrid-angle-102x102.png 102w\" sizes=\"(max-width: 467px) 100vw, 467px\" \/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/auxiliary-views-first-thrid-angle.png\" data-fancybox=\"gallery-145099\" data-caption=\"Auxiliary views\" aria-label=\"Open full image\"0><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/auxiliary-views-first-thrid-angle.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><figcaption class=\"wp-element-caption\">Auxiliary views<\/figcaption><\/figure>\n\n\n\n<p>Sometimes, the standard orthographic views still cannot depict a complex angled feature without distortion. So the current model would need an extra auxiliary view to show the true proportions of the slot. Because they are independent of the standard quadrant layout, auxiliary views are placed the same way in both projection systems.<\/p>\n\n\n\n<h3 id=\"isometric-view\" class=\"wp-block-heading\"><strong>Isometric view<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"248\" height=\"281\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/isometric-view.png\" alt=\"\" class=\"wp-image-147312\" style=\"max-width:400px\"\/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/isometric-view.png\" data-fancybox=\"gallery-145099\" data-caption=\"\" aria-label=\"Open full image\"1><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2026\/05\/isometric-view.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><\/figure>\n\n\n\n<p>An isometric view is an optional 2D projection where the three spatial axes are separated by 120 degrees. It gives the machinist a quick, visual 3D overview of the part. <strong>Isometric views are never dimensioned.<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-best-practices-for-first-angle-vs-third-angle\"><strong>Best Practices for First Angle vs. Third Angle<\/strong><\/h3>\n\n\n<div class=\"custom-table-block \" id=\"table-id-574\" >\r\n\t<div class=\"search-input-wrapper\">\r\n\t\t<svg width=\"16\" height=\"16\" viewBox=\"0 0 16 16\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\r\n\t\t\t<path d=\"M15.7812 13.833L12.6659 10.7177C12.5252 10.5771 12.3346 10.499 12.1347 10.499H11.6253C12.4877 9.39596 13.0002 8.00859 13.0002 6.49937C13.0002 2.90909 10.0911 0 6.50083 0C2.91056 0 0.00146484 2.90909 0.00146484 6.49937C0.00146484 10.0896 2.91056 12.9987 6.50083 12.9987C8.01006 12.9987 9.39742 12.4863 10.5004 11.6239V12.1332C10.5004 12.3332 10.5786 12.5238 10.7192 12.6644L13.8345 15.7797C14.1282 16.0734 14.6032 16.0734 14.8938 15.7797L15.778 14.8954C16.0718 14.6017 16.0718 14.1267 15.7812 13.833ZM6.50083 10.499C4.29167 10.499 2.50122 8.71165 2.50122 6.49937C2.50122 4.29021 4.28855 2.49976 6.50083 2.49976C8.70999 2.49976 10.5004 4.28708 10.5004 6.49937C10.5004 8.70852 8.71311 10.499 6.50083 10.499Z\" fill=\"#476175\"\/>\r\n\t\t<\/svg>\r\n\t\t<input type=\"search\" class=\"table-search-input\" id=\"table-search-574\" placeholder=\"Table search\">\r\n\t<\/div>\t\r\n\t<div class=\"table-wrapper\">\r\n\t\t<table style=\"border-collapse: collapse; width: 100%;\">\n<tbody>\n<tr>\n<td style=\"width: 24.4845%;\"><b>Scenario<\/b><\/td>\n<td style=\"width: 75.3866%;\"><b>Actionable Best Practices<\/b><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 24.4845%;\"><b>Before Using a Drawing<\/b><\/td>\n<td style=\"width: 75.3866%;\"><span style=\"font-weight: 400;\">Locate the projection symbol in the title block.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Verify the standard in use (ISO vs. ASME).<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Confirm with the supplier or client if anything is unclear.<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 24.4845%;\"><b>When Creating Drawings<\/b><\/td>\n<td style=\"width: 75.3866%;\"><span style=\"font-weight: 400;\">Choose the projection method based on the target region and manufacturing partner.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Keep the layout and projection style completely consistent across the drawing pack.<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 24.4845%;\"><b>When Working Globally<\/b><\/td>\n<td style=\"width: 75.3866%;\"><span style=\"font-weight: 400;\">Do not assume your international partners share your local standards.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Clearly state the projection method in the title block, supporting documentation, and communications.<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 24.4845%;\"><b>When Using CAD Software<\/b><\/td>\n<td style=\"width: 75.3866%;\"><span style=\"font-weight: 400;\">Familiarize yourself with how your specific CAD tool switches between first angle and third angle.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Always export final drawings with the correct projection setting applied and the symbol clearly visible.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\t<\/div>\r\n<\/div>\r\n<style>\r\n\t.custom-table-block table{\r\n\t\theight: initial!important;\r\n\t}\r\n\t.search-input-wrapper{\r\n\t\tposition: relative;\r\n\t\tmargin-bottom: 24px;\r\n\t}\r\n\t.search-input-wrapper svg{\r\n\t\tposition: absolute;\r\n\t\ttop:50%;\r\n\t\tleft:12px;\r\n\t\ttransform: translateY(-50%);\r\n\t}\r\n\t.table-search-input{\r\n\t\tpadding: 0 0 0 40px;\r\n\t\tborder:1px solid #C1CAD1;\r\n\t\theight: 44px;\r\n\t\twidth: 201px;\r\n\t\tcolor:#092C47;\r\n\t\tfont-family: Open Sans;\r\n\t\tfont-size: 16px;\r\n\t\tfont-weight: 400;\r\n\t\tline-height: 24px;\r\n\t\tletter-spacing: 0em;\r\n\t\ttext-align: left;\r\n\t}\r\n\t.table-search-input::placeholder{\r\n\t\tcolor:#092C47;\r\n\t}\r\n\t\r\n\t.custom-table-block thead th{\r\n\t\ttext-align: left;\r\n\t\twhite-space:nowrap;\r\n\t}\r\n\t\r\n\t.custom-table-block thead{\r\n\t\tmargin-bottom: 14px;\r\n\t}\r\n\r\n\t.custom-table-block tbody tr:nth-child(odd){\r\n\t\tbackground-color: #F6F9FF;\r\n\t}\r\n\r\n\t.custom-table-block tbody, .custom-table-block thead, .custom-table-block tr, .custom-table-block td, .custom-table-block th{\r\n\t\theight: initial!important;\r\n\t}\r\n\t\r\n\t.custom-table-block tbody td{\r\n\t\tcolor:#092C47;\r\n\t\tfont-family: Open Sans;\r\n\t\tfont-size: 16px;\r\n\t\tfont-weight: 400;\r\n\t\tline-height: 24px;\r\n\t\tletter-spacing: 0em;\r\n\t\ttext-align: left;\r\n\t\tpadding: 7px;\r\n\t}\r\n\t\r\n\t.custom-table-block thead th{\r\n\t\tfont-family: Open Sans;\r\n\t\tfont-size: 16px;\r\n\t\tfont-weight: 700;\r\n\t\tline-height: 24px;\r\n\t\tletter-spacing: 0em;\r\n\t\ttext-align: left;\r\n\t\tcolor:#092C47;\r\n\t\tposition: relative;\r\n\t}\r\n\t.custom-table-block thead th:after{\r\n\t\tcontent:\"\";\r\n\t\tdisplay: inline-block;\r\n\t\tbackground-image: url(\"data:image\/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http:\/\/www.w3.org\/2000\/svg'%3E%3Cpath d='M10.585 0.585938L6 5.17094L1.415 0.585938L0 2.00094L6 8.00094L12 2.00094L10.585 0.585938Z' fill='%23476175'\/%3E%3C\/svg%3E%0A\");\r\n\t\tmargin-left: 8px;\r\n\t\tbackground-position: center center;\r\n\t\tbackground-size: 12px 7.5px;\r\n\t\tbackground-repeat: no-repeat;\r\n\t\twidth: 24px;\r\n\t\theight: 12px;\r\n\t}\r\n\t.custom-table-block{\r\n\t\tmargin: 20px 0;\t\r\n\t}\r\n\t.custom-table-block .table-wrapper{\r\n\t\twidth: 100%;\r\n\t\toverflow-x: auto;\r\n\t}\r\n\t@media(max-width: 768px){\r\n\t\t\/* .custom-table-block tbody td{\r\n\t\t\twhite-space: nowrap;\r\n\t\t} *\/\r\n\t\t.custom-table-block .table-wrapper{\r\n\t\t\tmax-width: calc(100vw - 16px);\r\n\t\t}\r\n\t}\r\n<\/style>\r\n\n\n\n<h2 id=\"the-choice\" class=\"wp-block-heading\"><strong>The Choice<\/strong><\/h2>\n\n\n\n<p>The choice between first angle and third angle projection comes down entirely to regional conventions. Europe and Asia predominantly use first angle, while North America and Australia rely on third angle. Neither system has an inherent technical advantage over the other.<\/p>\n\n\n\n<p>As an engineer or designer, what matters most is <strong>consistency<\/strong>. Always explicitly mark your projection method in the <a href=\"https:\/\/xometry.pro\/en\/articles\/prepare-technical-drawing\/\" target=\"_blank\" rel=\"noreferrer noopener\">technical drawing&#8217;s<\/a> title block and stick to that system throughout the entire drawing pack. If you are supplying drawings to an overseas client or a global manufacturing partner like Xometry, always confirm which system their machinists expect to receive.<\/p>\n","protected":false},"author":2899,"featured_media":147179,"comment_status":"open","ping_status":"closed","template":"","categories":[],"c-tag-articles":[],"global-tag":[699],"class_list":["post-145099","articles","type-articles","status-publish","has-post-thumbnail","hentry","global-tag-design-eu"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.7 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>First Angle vs. Third Angle Projection: What\u2019s the Difference? | Xometry Pro<\/title>\n<meta name=\"description\" content=\"Learn the exact differences between first and third-angle projections. 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