Question

Two angles, 1 and 2, in a diagram are supplementary. If m 1 = 77°
, what equation can you write to solve for m 2? Let m 2 = x°

x° + 77° = 180°

x° = 77°

x + 77° = 90°

x° = 90° - 77°

Answer 1

x° = 13°