Question

What is the measure, in degrees, of the highlighted angle?

Answer 1

`36^\circ`

Explanation:

If you add the measures of the two marked angles, you get
`180^\circ`. The two angles form what some call a linear pair.

Set up and solve an equation.

4x + x = 180

5x = 180

x = 180 / 5

x = 36 degrees