Question

If the sum of measures of angle a and b is 280 degrees, what is the measure of angle C?

A. 80 degrees
B. 160 degrees
C. 140 degrees
D. 40 degrees

Answer 1

40

Explanation:

Answer 2

40 degrees

Explanation:

because angle b and angle a are vertical angles they are congruent and if they add up to 280 you just have to divide that by 2 to get the value of one of the angles

280/2=140

because angle c and angle b are supplementary they are going to add up to equal 180

180-140=40 so c=40