PRE-ALGEBRA
Lesson 111 of 171

LINES AND ANGLES
Complementary and Supplementary Angles
Students learn that two angles that have a sum of 90 degrees are complementary angles, and two angles that have a sum of 180 degrees are supplementary angles. Students also learn to find the complement of a given angle by subtracting the measure of the angle from 90, and find the supplement  more...
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