Ellipses Part 1
http://www.youtube.com/watch?v=5nxT6LQhXLM
Part 2
http://www.youtube.com/watch?v=BnLlKv6-DbA&feature=fvwrel
Problem Solving
http://www.youtube.com/watch?v=IWZmsSzxeD8&feature=related
Hyperbolas
http://www.youtube.com/watch?v=Z6cwpsDC_5A
http://www.youtube.com/watch?v=7v1koVqwXK4&feature=relmfu
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