# How to find one side of a right triangle.

Assuming you know one acute angle and the side adjacent to it, use a calculator (or a chart) to do this:

`tan(angle) x adjacent = opposite`

In a right triangle with an acute angle of 3deg whose adjacent side is 2.5 you’d get:

`tan3 x 2.5 = .13101`

and .13101 is….. what? the other leg? which, the long, the short, or the hypotenuse?

Quite right.

I think I got that fixed.