Khan/khan-exercises — pull request #25462 by mwittels (2012-07-05 18:54:04+00:00)
Title: Proofs part1

Just the "find the wrong statement" proof exercise and the proofs.js util.

http://sandcastle.khanacademy.org/media/castles/mwittels:proofsPart1/exercises/geometry_proofs.html