Question

Angle A and angle B are supplementary angles. If m angle A = (2x + 26)° and m

angle B = (x + 25)°, then find the measure of angle B.


x=43

Answer 1

m angle B = 68°

Explanation:

Since they are supplementary, they add up to 180°

(2x+26) + (x+25) = 180

add like terms together

3x+26+25=180

simplify the left side

3x+51=180

subtract 51 from both sides

3x=129

divide both sides by 3

x=43

Then you plug in x into measure B

(43)+25

68