### Home > INT2 > Chapter 3 > Lesson 3.1.4 > Problem3-45

3-45.

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

1. This is a right triangle, so use the Pythagorean Theorem to solve for $x$.

1. What is the sum of these angles?
How can you use the sum of the angles to write an equation and solve for $x$?

1. Are these triangles similar?
If so, how can you use their similarity to write an equation and solve for $x$?