A good drafting triangle isn't something you think about until it's wobbly, warped, or missing from your kit. We carry standard 45° and 30°/60° triangles, adjustable triangles, and durable aluminum versions in several sizes and edge styles.
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Scholastic Clear Triangles - Straight Edge
Pacific Arc$1.90 - $5.40Pacific Arc Clear Scholastic Drafting Triangles are durable, transparent triangles designed for accurate technical drawing, layout work, geometry, and drafting. The fully clear polystyrene construction allows you to see the drawing surface underneath,... -
Scholastic Triangle Set
Pacific Arc$2.60 - $4.80One of the best value triangles on the market! Designed specifically for students, crafters, and professionals on a budget.Available in: 8", 10", 12"Features: Set of two triangles. 1 each 30/60 & 45/90 degree trianglesIncludes reusable caseInch/Metric... -
Super Math Set
Staedtler$23.70The Staedtler Super Math Set contains all the essential tools a student needs for math, architecture, and engineering courses.Contains: 6" Compass with adaptorExtension barTube of compass lead0.7mm Mechanical PencilEraser180 degree protractor12"... -
Tru-Angle Adjustable Triangle - Straight Edge
Alvin Drafting$21.90 - $37.05The Alvin Drafting Tru-Angle Adjustable Triangle combines the features of a 45°/90° adjustable triangle with those of a protractor, allowing you to draw angles from 0° to 90° with ½° accuracy. It boasts die-engraved graduations for professional...
45° and 30°/60° Triangles
These are the two triangles you will use most often. The 45° triangle has two 45° angles and one 90° angle, making it great for drawing vertical, horizontal, and 45° lines. The 30°/60° triangle provides 30°, 60°, and 90° angles and is commonly used for architectural drafting and isometric drawings.
If you are taking a drafting class, you will usually want both a 45° and a 30°/60° triangle. Used together, they allow you to draw additional angles such as 15° and 75° without the need for an adjustable triangle. That's one reason these two triangles remain standard items in most drafting kits.
Adjustable Triangles
An adjustable triangle allows you to set and lock almost any angle, making it more versatile than a standard 45° or 30°/60° triangle. They are useful for roof pitches, custom angles, and other layouts where fixed triangles can be limiting.
Most adjustable triangles lock into position with a thumbscrew, and many include angle graduations for quick reference. While not required for most drafting classes, they are a handy tool for advanced drafting and layout work.
Straight Edge or Inking Edge?
A straight edge triangle sits flat against the paper and works well for everyday pencil drafting. An inking edge triangle has a raised ridge along the edge that lifts it slightly off the paper, helping prevent technical pen ink from bleeding underneath and smearing.
If you are primarily working in pencil, a straight edge triangle is usually the best choice. If you are producing inked drawings, an inking edge can make a noticeable difference.
Smoke, Fluorescent, or Clear?
Clear acrylic triangles allow you to see your drawing underneath the tool, making alignment easy. Smoke triangles offer the same visibility while reducing glare from bright lights. Fluorescent triangles, often bright orange or yellow, are easy to spot on a crowded drafting table or job site and remain highly visible in a variety of lighting conditions.
The right choice usually comes down to personal preference, but many students and professionals prefer fluorescent triangles because they are easy to find when surrounded by plans, tools, and paperwork.
Complete Your Drafting Workspace
Pair your drafting triangles with other essential drafting tools to create accurate layouts, technical drawings, engineering plans, and architectural designs.
Shop Drawing Compasses | Shop Drafting Scales | Shop Protractors | Shop T-Squares | Shop Drafting Templates | Shop Drafting Pencils & Leads | Shop Drafting Paper | Shop Portable Drafting Boards
