# How do you solve a triangle given a=10 b=8 B=130 degrees?

##### 1 Answer

Nov 9, 2015

#### Explanation:

The Law of Sines states

We are given

manipulating that you get

Taking the inverse

This is the angle A. If you have 2 angles of a triangle you really have 3 angles. Just take the sum of the two known angles and subtract them from 180.

Now that you have all three angles you can use the cosine equation

I hope that helps.