# How do you find the related acute angle?

##### 1 Answer

Nov 26, 2015

The related acute is an acute angle (**2, 3, or 4**. There is **no related acute angle** if the terminal arm lies in **quadrant 1**.

Here are some examples:

If the terminal arm is in quadrant 2, do

If the terminal arm is in quadrant 3, do the principle angle minus

If the terminal arm is in quadrant 4, do