Angles a and b are supplementary. angle a has a measure of 80°. what is the measure of angle b? the measure of angle b is what

a+b = 180

80+b=180

b=180-80

b=100

Answer

100°

Explanation

Supplementary angle are angles that add up to 180.

If a and b are supplementary angles then,

a + b = 180°

Angle a = 80°

a + b = 180°

80° + b = 180°

80° + b - 80 = 180° - 80°

b = 100°