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In this module, you can study the formula and concept of the Pythagorean Theorem; how to use the Pythagorean Theorem to figure out the length of any side of a right triangle.

The video above, from examsolutions.co.uk, does a good job explaining the Pythagorean Theorem and how to use it. The narrator defines many important vocabulary terms, such as hypotenuse, right angle and right triangle.

The Pythagorean Theorem only works with right triangles, but you can use it in many different ways. For example, carpenters use the Pythagorean Theorem with building lines to set out a house foundation to ensure the foundations are square.

The formula** a***^{2} + b^{2} = c^{2} *means

- Read about Pythagoras' TheoremHere at the Khan Academy you will find a clear explanation and practice problems.
- Study the Pythagorean TheoremMath.com have put together a full online lesson for the Pythagorean Theorem. You'll learn a little about the history of the theorem, see some worked examples and practice a few of your own.
- Download a Pythagorean Theorem WorksheetCreate and print your own downloadable worksheet at math-aids.com. If you tick the box at the bottom of the page, your worksheet will contain worked-out answers.
- Quiz yourself on the Pythagorean TheoremTake a practice quiz at onlinemathlearning.com. HINT: The quiz asks you to calculate values for side a, b or c. C is always the hypotenuse in this quiz (the longest side), so be sure the set your formula up correctly.

Use these search terms to find your own resources:

*Pythagorean TheoremPythagoras' Theorem*