Catalog of Mathematical Knots
This is an amazing collection of interactive diagrams of mathematical knots:
Click on any of the hundred or so knots here to go to a flash-based interactive diagram of the knot that can be rotated and manipulated.
New York Times Learning Network: Symmetry and Soccer Balls
My latest contribution to the New York Times Learning Network’s 15-Minute Lesson Plan series was inspired by Siobhan Roberts’s wonderful article on the geometry of the soccer ball. The Learning Network article is freely available Read more
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