Two angles that add up to 90 degrees are called complementary angles.
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The angles are complimentary when they add to 90 degrees.
Complementary Angles add up to 90 degrees. Supplementary Angles add up to 180 degrees.
Complementary, (and two angles whose measures add up to 180 degrees are Supplementary)
90 degrees, supplementary angles add up to 180*90 degrees.
Complementary angles are two angles that add up to exactly 90 degrees.