
James Charbonneau
@jimmycorp
Astrophysicist, educator, and general puter of foot in mouth at University of British Columbia.
ID: 26805426
http://www.jimmycorp.com 26-03-2009 17:58:17
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TIL this cute proof of the fact that the exterior angles of a convex polygon add up to 2pi. (From Dave Richeson's book Euler's Gem.)



Trying out TunnelBear so I can browse privately from my ISP tunnelbear.com/apps .









