WApproximations of πWBarbier's theoremWLudolph van CeulenWChronology of computation of πWCircleWDinostratus' theoremWA History of PiWIndiana Pi BillWThomas Fantet de LagnyWJohann Heinrich LambertWLindemann–Weierstrass theoremWMilüWPi DayWRadianWSrinivasa RamanujanWRhind Mathematical PapyrusWSpiral of TheodorusWSquaring the circleWTurn (angle)WJurij VegaWZu Chongzhi
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