complementary
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.
Supplementary means the sum of two angles equal to 180 degrees. The Sum of 90 degrees would be complimentary, where the sum of two angles equal to 90 degrees.
Two angles whose sum is 90 degrees are called complementary angles.
The sum of two complementary angles is 90 degrees. The sum of two supplementary angles is 180 degrees.
Two or more angles that sum to 90 degrees are called complimentary angles.
Two angles that have a sum of 90 degrees are called complementary angles.
Two angles are complementary if and only if their sum is 90 degrees.
If you mean "Does the sum of two angles equal exactly 90 degrees?" it is yes.
Two angles are considered complementary if their measures add up to 90 degrees. This means that if the sum of two angles equals 90 degrees, they are classified as complementary. Conversely, if two angles are complementary, their measures must sum to 90 degrees. Thus, the statements effectively define the same relationship between complementary angles.
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Two angles the sum of whose measures is 90 degrees are complimentary angles.
Two angles whose sum is 90 degrees are called complementary angles. Two angles whose sum is 180 degrees are called supplementary angles. A single angle of 90 degrees is called a right angle.