### Home > PC > Chapter 1 > Lesson 1.2.2 > Problem1-89

1-89.

The area of $ΔJKL$ is $30 \text{ in}^{2}$. The length of side $JL$ is $12$ in. Find the length of side $KL$.

Label the height.

Since the area of the triangle is given. What is the area of any triangle?

$\frac{1}{2}\text{(base)(height)}$

Find h. Then find length KL by using the sine function.

$\approx 8.51\text{ inches}$