Khan/khan-exercises — pull request #14302 by Lovinglobo (2012-02-21 17:06:29+00:00)
Title: Slice cone exercise

This visual exercise show the principles of conic sections outlined in the video:

Introduction to Conic Sections -
http://www.khanacademy.org/video/introduction-to-conic-sections

It could be an addition or replacement of the existing exercise:

http://www.khanacademy.org/exercise/recognizing_conic_sections

The only dependencies are Raphael and jQuery.

This is a first commit to see how you guys like it, what needs to be added and or changed.