Question

Two angles are supplementary. One of the angles measures 55∘ . The other angle must measure? A.125 B.55 C.45 D.35

Answer 1

The other angle must measure 125.

Explanation:

Supplementary angles by definition are two angles that add up to 180 degrees. If one of the angles is 55, then the other angle must be a value that when added to 55 will equal 180.

x + 55 = 180

x = 125.