Forgotten Flexagon (extra) - Numberphile

Main video:    • The Forgotten Flexagon - Numberphile   More Matt Parker (video playlist): http://bit.ly/Matt_Videos Catch Matt on the Numberphile podcast too: https://www.numberphile.com/podcast Matt's own website, with links to all his stuff, is at: http://standupmaths.com Order a Parker Square T-Shirt: https://teespring.com/parker-square-b... NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook:   / numberphile   Numberphile tweets:   / numberphile   Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile Videos by Brady Haran Animation and flexagons by Pete McPartlan Support us on Patreon:   / numberphile   Brady's videos subreddit:   / bradyharan   A run-down of Brady's channels: http://www.bradyharan.com Sign up for (occasional) emails: http://eepurl.com/YdjL9