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Answer» Answer: Learn more This article needs additional citations for verification. 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. triangle, set square The simplest form of set square is a triangular piece of transparent plastic (or formerly of polished wood) with the centre removed. More commonly the set square bears the markings of a RULER and a half circle protractor. The outer edges are typically bevelled. These set squares come in two usual forms, both right TRIANGLES: one with 90-45-45 degree angles, the other with 30-60-90 degree angles. Combining the two forms by placing the hypotenuses together will also yield 15° and 75° angles. They are often purchased in packs with protractors and compasses Explanation: make me a brain list |
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