Question

Two streets form an intersection. C and D are supplementary

angles. If the measure of C is 140° and the measure of D is
two times the value of x, what is the value of x?

Answer 1

20degrees

Explanation:

The sum of angle C and D is 180 degrees since they are supplementary

Given

m<C = 140 degrees

m<D = 2x

Taking the sum and equating to 180

140 + 2x = 180

2x = 180-140

2x = 40

x = 40/2

x = 20 degrees

Hence the value of x is 20degrees