In this ACT Math video, we cover The Law of Sines. The rules of SOH-CAH-TOA and hypotenuse, opposite and adjacent sides only apply to right triangles. When we don’t have a right triangle, other formulas sometimes need to be used to find sides and angles. One of those formulas is The Law of Sines.

A brief overview of the formula is given, and then two different methods using the formula are used to solve the problem.

The example used in the video will be based off the following ACT math problem below:

Click here to see the problem.

This is the practice exercise we will work out in the video:

Because this is a formula that students do not use often, the practice problem is considered a HARD difficulty problem.