Video Links 7-6

Videos:
This is a whimsical video on Lobachevski (time 3:08)

This is a nice introduction to elliptical and hyperbolic geometry (time: 8:33)

Restful video of math in art (time: 3:16)

Interesting video on the proportions of the human face (time: 9:57)

Projective Geometry and Perspective (time: 9:50)