### Home > CCG > Chapter 4 > Lesson 4.1.4 > Problem 4-40

4-40.

Use the relationships in the diagrams below to write an equation and solve for .

This is a right triangle, so use the Pythagorean Theorem to solve for

.

What is the sum of these angles?

How can you use the sum of the angles to write an equation and solve for?

Are these triangles similar?

If so, how can you use their similarity to write an equation and solve for?