### Home > CCG > Chapter 7 > Lesson 7.2.4 > Problem7-85

7-85.

Examine the triangles below. For each, solve for $x$ and name which tool you use. Show all work.

1. What trig ratio can you use to solve for $x$?

$x\approx10.73$, tangent

1. Find the measure of the unknown angle. Now what law can you use to solve for $x$?

1. Use the Law of Cosines to solve for $x$.

$x\approx15.30$, Law of Cosines