## set square
The most basic form of set square is a triangular piece of clear plastic or wood with the center removed and the outer edges beveled. Commonly, the markings of a ruler and a half circle protractor are inscribed. These set squares come in two usual forms, with 90-45-45 degree angles and 30-60-90 degree angles. Combining the two forms by placing the hypotenuses together yields 15° and 75° angles. ## Related category• GEOMETRY | |||||||

Home • About • Copyright © The Worlds of David Darling • Encyclopedia of Alternative Energy • Contact |