What is this shape I'm destroying called?

2012-10-02

[public] 103K views, 1.65K likes, 16.0 dislikes audio only

Matt was given this shape by Mike Borcherds at the 2011 MathsJam Weekend. Do you know what it is called? Can you make one? Proof of either in the comments please. MathsJam Weekend: http://mathsjam.com/ Mike: https://twitter.com/mike_geogebra