Respuesta :

SJ2006

a+b = 180

80+b=180

b=180-80

b=100

smmwaite

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°