The Most Accurate Value for Pi in Ancient Times

Video Description

Who discovered this mysteriously accurate value for π ? Celebrate #PiDay with the untold story of 355/113 and learn a history of pi that schools do not teach. 0:00 intro 2:25 accurate 355/113 4:05 the mystery 6:42 summary facts 7:52 Liu Hui 14:40 Zu Chongzhi 15:58 He Chengtian 22:07 deriving 355/113 Get early access to videos by supporting the channel https://www.youtube.com/channel/UCHnj59g7jezwTy5GeL8EA_g/join Patreon https://www.patreon.com/mindyourdecisions https://commons.wikimedia.org/wiki/File:Liu_hui.jpg https://commons.wikimedia.org/wiki/File:%E7%A5%96%E5%86%B2%E4%B9%8B%E9%93%9C%E5%83%8F.jpg Story of pi https://www.youtube.com/watch?v=tB0zjT75yto https://en.wikipedia.org/wiki/Rod_calculus Milü https://en.wikipedia.org/wiki/Mil%C3%BC Chronology of computation of π https://en.wikipedia.org/wiki/Chronology_of_computation_of_%CF%80 Liu Hui's π algorithm https://en.wikipedia.org/wiki/Liu_Hui%27s_%CF%80_algorithm Pi https://en.wikipedia.org/wiki/Pi Mystery of 355 over 113 https://web.archive.org/web/20100322225540/https://davidbau.com/archives/2010/03/14/the_mystery_of_355113.html https://news.ycombinator.com/item?id=4285531 https://en.wikipedia.org/wiki/Zu_Chongzhi mediant https://en.wikipedia.org/wiki/Mediant_(mathematics) https://math.stackexchange.com/questions/1989104/mediant-inequality-proof-fracab-fracacbd-fraccd Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Send me suggestions by email (address at end of many videos). I may not reply but I do consider all ideas! If you purchase through these links, I may be compensated for purchases made on Amazon. As an Amazon Associate I earn from qualifying purchases. This does not affect the price you pay. Book ratings are from January 2025. My Books (worldwide links) https://mindyourdecisions.com/blog/my-books/#worldwide My Books (US links) Mind Your Decisions: Five Book Compilation https://amzn.to/2pbJ4wR A collection of 5 books: "The Joy of Game Theory" rated 4.2/5 stars on 564 reviews http://amzn.to/1uQvA20 "The Irrationality Illusion: How To Make Smart Decisions And Overcome Bias" rated 4.2/5 stars on 55 reviews http://amzn.to/1o3FaAg "40 Paradoxes in Logic, Probability, and Game Theory" rated 4.2/5 stars on 81 reviews http://amzn.to/1LOCI4U "The Best Mental Math Tricks" rated 4.3/5 stars on 148 reviews http://amzn.to/18maAdo "Multiply Numbers By Drawing Lines" rated 4.5/5 stars on 57 reviews http://amzn.to/XRm7M4 Mind Your Puzzles: Collection Of Volumes 1 To 3 https://amzn.to/2mMdrJr A collection of 3 books: "Math Puzzles Volume 1" rated 4.4/5 stars on 138 reviews http://amzn.to/1GhUUSH "Math Puzzles Volume 2" rated 4.2/5 stars on 45 reviews http://amzn.to/1NKbyCs "Math Puzzles Volume 3" rated 4.3/5 stars on 38 reviews http://amzn.to/1NKbGlp 2017 Shorty Awards Nominee. Mind Your Decisions was nominated in the STEM category (Science, Technology, Engineering, and Math) along with eventual winner Bill Nye; finalists Adam Savage, Dr. Sandra Lee, Simone Giertz, Tim Peake, Unbox Therapy; and other nominees Elon Musk, Gizmoslip, Hope Jahren, Life Noggin, and Nerdwriter. My Blog https://mindyourdecisions.com/blog/ Twitter https://twitter.com/preshtalwalkar Instagram https://www.instagram.com/preshtalwalkar/ Merch https://teespring.com/stores/mind-your-decisions Patreon https://www.patreon.com/mindyourdecisions Press https://mindyourdecisions.com/blog/press