CPM Homework Help : PCT Problem 2-145

Triangle, bottom side labeled. 18 cm, left side labeled 10 cm, right side labeled 12 cm> Find the area of the triangle to the right.

Step 1:

Use the Law of Cosines to determine the measure of one of the angles.

Step 2:

Use the formula below to calculate the area.

$A=\frac{1}{2}ab\sin(\theta)$