### Home > CC3 > Chapter 8 > Lesson 8.3.1 > Problem 8-130

8-130.

Find the value of each indicated angle in the following figures. Do not use a protractor. Use the properties of straight and vertical angles to help you.

These angles are supplementary.

and b are vertical angles. What does that tell you about the measure of angle ?

Set up an equation relating

and . . Subtract 133° from both sides.

°.

d and

are vertical angles, and f and are supplementary.

. Refer to part (c) for the steps to solving this problem.