Respuesta :
If the sum of the measures of two angles is 180° , then the angles are supplementary. Simplify. To isolate a , divide both sides of the equation by 3 . So, the measures of the two supplementary angles are 60° and 120° .
Answer:
see below
Step-by-step explanation:
Supplementary angles are two angles that add to 180
120+60 = 180
The two angles are supplementary