Two angles that add to 90 degrees are called complementary.
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Two angles that have a sum of 90 degrees are called complementary angles.
They are said to be supplementary angles if they add up to 180 degrees.
They are said to be complementary angles that add up to 90 degrees
They all add up to 360 degrees. Also, opposite angles are congruent (equal) and any two adjacent/consecutive angles add up to 180 degrees. This term is also called supplementary.