What is true of complementary angles?

Complementary angles are defined as two angles whose measures add up to 90 degrees. This means that if you have one angle that is, for instance, 30 degrees, the angle that complements it would be 60 degrees, as their sum equals 90.

This characteristic distinguishes complementary angles from other angle classifications, such as supplementary angles, which sum to 180 degrees. It is also important to note that complementary angles can exist as non-adjacent angles; they do not need to be next to each other or share a common vertex. Additionally, complementary angles do not need to be equal in size; one angle can be larger or smaller than the other as long as their measures together total 90 degrees.

Thus, the essential truth about complementary angles is their specific requirement of summing to 90 degrees.