Help! - Pythagorean Theorem Proof
In need of help. I've searched the internet and can't seem to find a pythag proof that makes since to me.
Looking at the diagram below and using the following theorem, how do you prove the pythagorean theorem.
Theorem: The power of a point is well defined; that is, the same value is obtained regardless of which line l is used in the definition as long as the line has at least one point of intersection with the circle.
I'd even settle for just proving the pythagorean theorem without using the above theorem.
Prove: (AD)(DC) = (AE)(EB) + (BF)(FC)