Numberphile | A Miraculous Proof (Ptolemy's Theorem) - Numberphile @numberphile | Uploaded 4 years ago | Updated 6 minutes ago
Featuring Zvezdelina Stankova... Want more?
Part 2 (bringing in Pentagons and the Golden Ratio) is at: youtu.be/o3QBgkQi_HA
More links & stuff in full description below ↓↓↓

Zvezda's Numberphile playlist: http://bit.ly/zvezda_videos

Zvezda's webpage: https://math.berkeley.edu/~stankova/

Epic Circles: youtu.be/sG_6nlMZ8f4

Triangle Magic Highway: youtu.be/wVH4MS6v23U

Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile

We are also supported by Science Sandbox, a Simons Foundation initiative dedicated to engaging everyone with the process of science. simonsfoundation.org/outreach/science-sandbox

And support from Math For America - mathforamerica.org

NUMBERPHILE
Website: http://www.numberphile.com
Numberphile on Facebook: http://www.facebook.com/numberphile
Numberphile tweets: twitter.com/numberphile
Subscribe: http://bit.ly/Numberphile_Sub

Videos by Brady Haran
Additional editing and animation by Pete McPartlan

Patreon: http://www.patreon.com/numberphile

Numberphile T-Shirts and Merch: teespring.com/stores/numberphile

Brady's videos subreddit: http://www.reddit.com/r/BradyHaran

Brady's latest videos across all channels: http://www.bradyharanblog.com

Sign up for (occasional) emails: http://eepurl.com/YdjL9