# Cosine Function on a Right Triangle

The cosine function can be used on a right triangle.

The cosine of an angle gives the ratio of the length of the adjacent side to the length of the hypotenuse.

This widget allows you to find the angle, adjacent and hypotenuse of a right triangle.

## Learn About the Cosine Function on a Right Triangle

Draw a right triangle by:

- Clicking on the canvas, or
- Entering
__two__of the angle, adjacent and hypotenuse.

## Dimensions of the Right Triangle

Degrees

Radians