Question

Which angle relationship means two angles add up to 90
degrees?

Answer 1

When two angles add to 90°, we say they "Complement" each other.

So if two angles are complementary,

then the sum of their measures is 90 degrees.

For example, if we had a 62 degree angle and an 18 degree angle,

these two angles are complementary because they add to 90 degrees.