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set square
A triangular ruler used in engineering and technical drawing, with the aim of providing a straight edge at a right angle or other particular planar angle to a baseline, commonly seen as 90°-45°-45° or as 30°-60°-90° shapes. Also known as a "triangle" or "drawing triangle" due to its triangular shape.
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The following tags are aliased to this tag: drawing_triangle and triangle_(tool) (learn more).
