This clip is just a few minutes of a multi-hour course.

Master this subject with our full length step-by-step lessons!

Lesson Summary: In this lesson, you'll how to use the pythagorean theorem to calculate the length of the third side of a right triangle. The pythagoren theorem is one of the most used of all math calculations. Becoming familiar with the pythagorean theorem is very important because it will be used in future lessons and classes.