Khan/khan-exercises — pull request #23823 by xymostech (2012-06-12 22:23:43+00:00)
Title: Add congruent angles exercise

Basic interactive exercise for finding congruent angles

Has a semi-framework which I'll be expanding to make more exercises.

Insight into naming the utility is very welcome.

sandcastle: http://sandcastle.khanacademy.org/media/castles/xymostech:congruency/exercises/angle_congruency.html

@mwittels @beneater