View source for Pí (uimhir)

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=== Stair ===
I bhfad ó shin thugtaí 3 mar luach do phí. Sa [[An Bhablóin|Bhablóin]], tugadh luach 3 1/8 ar phí. Trí gharmheastacháin leanúnacha polagán inscríofa is imscríofa, chruthaigh [[Airciméidéas]] gur (223/71) < <math>\pi</math> < ( 22/7), nó 3.1408 < <math>\pi</math> < 3.14285. 

Bhí garmheastachán ag na Sínigh timpeall 500 AD: 3550/113 = 3.1415929.... 

==== 'Lá π' ====
Ceiliúrtar 'Lá π' ar 14 Márta gach bliain''',''' deis ceiliúradh a dhéanamh ar an tairiseach matamaitice, ós rud é go scríobhtar an dáta 3/14 i Meiriceá agus cuimhneamh ar cheann de na hiarrachtaí is míchlúití a tugadh riamh ar reachtaíocht, i mí Feabhra 1897, an Bille um Phí de chuid [[Indiana]], creid nó ná creid.<ref>{{Luaigh foilseachán|title=Indiana Pi Bill|url=https://en.wikipedia.org/w/index.php?title=Indiana_Pi_Bill&oldid=1123640218|journal=Wikipedia|date=2022-11-24|language=en}}</ref>

Fill ar Pí (uimhir).

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