# How do you find the measures of the angles of the triangle whose vertices are A = (-1,0), B = (3,3) and C = (3, -2)?

##### 1 Answer

Please see the explanation.

#### Explanation:

It will not change anything with regard to side lengths or angles, if we add 1 to all of the x coordinates:

The length of side "a" (from C to B), is easy, because B and C have the same x coordinate, therefore, you just use the y coordinate difference:

The length of side "b" (from A to C) is made easier by A being the origin:

The same is true for the length of side "c" (from A to B):

It is an isosceles triangle so we need to find

Use the Law of Cosines: