Geometric geekery

[spudtater]

Non-algebraic proofs of Pythagoras' theorem:
- First an animation. Although it might not be strictly a proof, it's a great demonstration. (Alternate local copy.)
- Then a more thorough proof by tiling. A little less accessible, though.

I want to do geometric proofs! For example,

Is this a proof?

c d a ac ad b bc bd a+b (a+b)(c+d) c+d

Oh, and blah blah Pope blah.

Comments

[figg.livejournal.com]

The first one is a proof.
:D

[spudtater.livejournal.com]

Yay!
It's great, isn't it?