What is a 3 sided ruler called?

architect’s scale
The drafter’s ruler (also called an architect’s scale) has three sides with one or two scales along each of its six edges. One scale is measured in inches and fractions of an inch. The other scales are used to make reduced drawings. Using a three-sided drafter’s ruler isn’t too difficult if you know what to do with it.

What is a ruler used for in drafting?

A ruler is a stationery item and drafting tool used when drawing lines, as a guide for cutting, and for various other uses. It is available in different shapes and materials, depending on the type of lines the user wishes to draw. Some rulers have measurement gradations and can be used for measuring length.

What is a drafting ruler called?

An architect’s scale is a specialized ruler designed to facilitate the drafting and measuring of architectural drawings, such as floor plans and Multi-view orthographic projections.

What is a triangular ruler?

A triangular scale is a ruler that has a 3-lobed cross-section with 6 different types of scales on the edges (2 on each face) used for measuring and preparing scale drawings such as blueprints and maps. It is also called an architect’s scale.

What are the two types of design ruler?

The two types available, the 45-degree triangle and the 30/60-degree triangle, are named by the size of their acute, or small, angles. The 45-degree triangle has a 90-degree angle and two 45-degree angles; the 30/60 degree triangle has a 90-, a 30- and a 60-degree angle.

What is a half circle ruler called?

A protractor is a measuring instrument, typically made of transparent plastic or glass, for measuring angles. Some protractors are simple half-discs or full circles.

Why Is Set Square used?

A set square or triangle (American English) is an object used in engineering and technical drawing, with the aim of providing a straightedge at a right angle or other particular planar angle to a baseline. More commonly the set square bears the markings of a ruler and a half circle protractor.