Question

If (angle)A and (angle)B are supplementary, and m(angle)A = 57°, what is m(angle)B?

Answer 1

Answer:

123°

Step-by-step explanation:

Supplementary angles add up to be 180 degrees.

This means angles A and B will add up to be 180 degrees.

We can find the measure of angle B by subtracting 57 from 180

180 - 57

= 123

So, the measure of angle B is 123 degrees