Question

# If two angles are complementary, then the sum of their measures is…………………………

Hint- Think for definition of complementary angles. Complementary angles add up to give a sum of $90^0$.
Two angles are said to be complementary angles if sum of both the angle is equal to ${90^0}$
Let us suppose we have two angles $\alpha ,\beta$such that $\alpha + \beta = {90^0}$ then both of them are said to be complimentary
Hence the answer to this problem is ${90^0}$.