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This template is used on approximately 16,000 pages and changes may be widely noticed. Test changes in the template's /sandbox or /testcases subpages, or in your own user subpage . Consider discussing changes on the talk page before implementing them.
where C is the circumference of a circle, d is the diameter, and r is the radius.More generally, = where L and w are, respectively, the perimeter and the width of any curve of constant width.
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The number π (/ p aɪ / ⓘ; spelled out as "pi") is a mathematical constant, approximately equal to 3.14159, that is the ratio of a circle's circumference to its diameter.It appears in many formulae across mathematics and physics, and some of these formulae are commonly used for defining π, to avoid relying on the definition of the length of a curve.
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Use this template to properly display the lower-case Greek letter pi as a mathematical symbol: π. Notes Do not use {{ pi }} within the {{ math }} template; use π instead.
Pi (.hack), in the multimedia franchise .hack//G.U. Pi, in both: Life of Pi, a 2001 novel, and; Life of Pi, a 2012 adaptation; Pi, a member of Team Robo in Sega Soccer Slam; Pi, in the 2006 animated film Shark Bait and the 2012 sequel The Reef 2: High Tide