Inversion (extra) - Numberphile

Main video:    • A Miraculous Proof (Ptolemy's Theorem) - N...   See also:    • Pentagons and the Golden Ratio - Numberphile   Zvezda's Numberphile playlist: http://bit.ly/zvezda_videos Zvezda's webpage: https://math.berkeley.edu/~stankova/ Epic Circles:    • Epic Circles - Numberphile   Triangle Magic Highway:    • Triangles have a Magic Highway - Numberphile   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 Additional editing and animation 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