KnowraPiLinked fromLinked fromThe 21 pages that link to Pi, each with the reason it gives.All 21Broader topic 6Related 14Narrower topic 1Irrational numberBroader topic: Its irrationality was proved in the eighteenth century.Transcendental numberBroader topic: Its transcendence was proved by Ferdinand von Lindemann in 1882.Liu HuiBroader topic: Liu Hui estimated this constant by comparing circles with inscribed polygons.Transcendence theoryBroader topic: Lindemann proved its transcendence, resolving the classical impossibility of squaring the circle.Constant (mathematics)Broader topic: It is a geometric constant that appears in formulas for circles and periodic phenomena.Mathematical constantBroader topic: Pi is a universal geometric constant that also appears throughout analysis.