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Course Guide - USAID Teacher Education Project

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e) Finally, for an amusing real life example of similarity:f) Benchmark angles are those that serve as a reference point. They can be used bothto devolve other angles and to compare angles.The most common benchmark angle is the 90° right angle. Using the 90° angle as areference point, one can devolve the 180° straight angle and the 360° revolutionangle, and estimate the 45°, 22.5°, 135°, 60°, 30°, and 120° angles.

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