**Pythagoras Theorem**

The theorem is famous and can be proved by both algebraic and geometric method.

**Algebraic Method**

Consider the following figure and calculate the total area:

Click to enlarge.

Click to enlarge.

For more information, there are a few links to the proofs of Pythagoras theorem.

Wikipedia http://en.wikipedia.org/wiki/Pythagorean_theorem

http://jwilson.coe.uga.edu/emt669/Student.Folders/Morris.Stephanie/EMT.669/Essay.1/Pythagorean.html