# Sides of a right triangle

In a right triangle, the sides are connected to each other. In addition to the Pythagorean theorem, which allows you to find them, in a right triangle, you can also use the functions of sine, cosine, tangent and cotangent if only one side and any angle other than a straight one are known. To calculate the sides of a right triangle, use our convenient online calculator. To calculate the unknown side, you need to enter two known sides in the corresponding fields.

**Find the side of a right triangle****knowing the other two sides**

**Right triangle Catheter a**

**Right triangle Catheter b**

**Triangle hypotenuse c**