### Home > GC > Chapter 3 > Lesson 3.2.3 > Problem 3-70

3-70.

Use the relationships in each diagram below to solve for .

**Justify**your solution by stating which geometry relationships you used.

Parallel lines cut by a transversal creates equal angles.Which angles in the figure are equal?

Think of the angle measure of a circle. How can you use that measure to solve for

?

Use the Pythagorean Theorem. Remember to justify all your work with the relationships you used!