### Home > PC3 > Chapter 10 > Lesson 10.1.1 > Problem10-10

10-10.

The three legs of a triangle have lengths $7$ cm, $7$ cm, and $12$ cm.

1. What are the measures of the angles?

Use the Law of Cosines. Two of the angles will have the same measure since this is an isosceles triangle.

2. What is the area of the triangle?

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