Question

What is the measure of x?

Answer 1

Both angles are additional angles.

4x + x = 180

5x = 180

Divide both sides by 5:

x = 180/5

x = 36

Check the 3

Answer 2

The two angles are supplementary angles which means they need to equal 180 degrees when added together.

4x + x = 180

5x = 180

Divide both sides by 5:

x = 180/5

x = 36