The Classical WorldScience & Math Liu Hui's commentary and pi 263 CENotable Liu Hui writes a commentary on the Nine Chapters with proofs and computes pi by inscribing polygons in a circle. ▲ MattersSaveShareTrace roots Longest chain: The Big Bang → First stars ignite → Supernovae seed heavy elements → The Sun forms → Earth forms → First oceans → First life → Photosynthesis evolves → Great Oxidation Event → Complex cells (eukaryotes) → Multicellular life → First animals → Cambrian Explosion → First vertebrates → Jawed fish → Fish walk onto land → The amniotic egg → The Great Dying → Dinosaurs appear → Asteroid ends the dinosaurs → Early primates → Apes split from monkeys → Human line splits from chimpanzees → Walking upright → First stone tools → Genus Homo appears → Homo erectus → Control of fire → First fired clay figures → First pottery → Copper smelting → Bronze Age begins → Shang dynasty → Zhou dynasty and the Mandate of Heaven → Spring and Autumn period → Legalism (Shang Yang) → Qin unifies China → Han dynasty → The Nine Chapters on the Mathematical Art → Liu Hui's commentary and pi Community notesLoading notes… Learn more ranked by votesDocumentmathshistory.st-andrews.ac.ukLiu Hui (MacTutor) ↗Editor's pickBookShen Kangshen, John N. Crossley and Anthony W.-C. LunThe Nine Chapters on the Mathematical Art: Companion and Commentary ↗Editor's pickVideoSearch on YouTubeLiu Hui pi calculation polygons ↗Editor's pick