Khan Academy Static

The Pythagorean theorem is one of the most famous ideas in all of mathematics. This tutorial proves it. Then proves it again... and again... and again. More than just satisfying any skepticism of whether the Pythagorean theorem is really true (only one proof would be sufficient for that), it will hopefully open your mind to new and beautiful ways to prove something very powerful.

7635_Garfield_s_proof_of_the_Pythagorean_theorem.html

7638_Another_Pythagorean_theorem_proof.html

7637_Pythagorean_theorem_proof_using_similarity.html

7636_Bhaskara_s_proof_of_the_Pythagorean_theorem.html