Question

angle A and B are supplementary.Angle A has a measure 80 what measure of angle B the measure of angle B is​

Answer 1

Answer: 100

Step-by-step explanation:

Supplementary means they add up to 180. 180-80=100

Answer 2

Answer:

∠B = 100°

Step-by-step explanation:

Supplementary angles have a sum of 180°, thus

A + B = 180, that is

80 + B = 180 ( subtract 80 from both sides )

B = 100°