# How do you find the measure of each of the angles of a triangle given the measurements of the sides are 11, 11, 15?

##### 1 Answer

Jan 20, 2017

#### Answer:

Using the Law of Cosines. See explanation for details.

#### Explanation:

First we can use the Law of Cosines to find the angle opposite to the triangle's base (i.e. the longest side):

To calculate the remaining angles we can use the fact that the triangle is isosceles.

Using this fact we can write that: