Two angles that sum to 90 degrees are called complementray angles. The term is not usually applied to three or more angles that sum to 90 degrees.
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The angle sum of a pair of supplementary angles is 180 degrees.
They are called supplementary angles. See the related link below for more information.They are complementary angles that add up to 90 degrees
The sum of two acute angles of a right triangle must equal 90 degrees.
The angles are complementary.
Sum of exterior angles = 360 degrees Sum of interior angles = 1440 degrees