# How To: Solve Pythagorean Theorem proofs and geometry problems

In this math lesson we will investigate easy Pythagorean Theorem proofs and problems.

The Pythagorean Theorem takes place in a right triangle. The longest side in a right triangle is called hypotenuse, and the other two sides are called legs. The hypotenuse opposes the right angle.

According to the Pythagorean Theorem:

A squared + B squared = c squared

The Pythagorean Theorem is one of the most important theorems in geometry. You can use it to find the unknown side in a right triangle, and to find the distance between two points.

Watch the above videos to learn how to apply this theorem when finding the unknown side or the area of a right triangle. (1) Part 1 of 3 - How to Solve Pythagorean Theorem proofs and geometry problems, (2) Part 2 of 3 - How to Solve Pythagorean Theorem proofs and geometry problems, (3) Part 3 of 3 - How to Solve Pythagorean Theorem proofs and geometry problems

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