Pi: Difference between revisions

Revision as of 06:28, 16 October 2005

Revision as of 01:42, 17 October 2005

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{{otheruses|pie}}

[[Image:Greek pi.png|right|thumb|110px|The [[minuscule]], or lowerLower-case, <b>pi</b>]]

The [[mathematical constant]] '''π''' is the [[ratio]] of a [[circle]]'s [[circumference]] ([[Greek language|Greek]]<!-- It would be nice if <nobr> worked: --> <u>'''π'''</u>εριφέρεια, periphery) to its [[diameter]] and is commonly used in [[mathematics]], [[physics]], and [[engineering]]. The name of the [[Greek alphabet|Greek letter]] [[Pi (letter)|π]] is '''pi''' (pronounced ''pie''), and this spelling can be used in typographical contexts where the Greek letter is not available. π is also known as '''[[Archimedes]]' constant''' (not to be confused with [[Archimedes number|Archimedes' number]]) and '''[[Ludolph van Ceulen|Ludolph]]'s number'''.