Which drafting tool is used for common angles such as 30, 60, 45, and 90 degrees?

• A. 30-60 Degree Drafting Triangle
• B. Adjustable Speed Square
• C. Circle Stencil
• D. Chalk Line

Answer: (A)

This question hinges on using a tool that provides standard, fixed angles for quick, accurate drafting. A 30-60 degree drafting triangle is designed exactly for those common directions—90 degrees at the corner, with lines that run along the 30-degree and 60-degree orientations. It’s the straightforward choice when you need reliable angles like 30, 60, and 90 without measuring each time, and you can pair it with a straightedge to build up your drawing quickly.

The other tools don’t serve this purpose as directly. An adjustable speed square can be set to various angles but is more of a carpenter’s tool and isn’t the go-to for standard drafting angles. A circle stencil is for circles, not angles, and a chalk line marks straight lines rather than giving fixed angular guidance.