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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.
This is a documentation subpage for Template:Pi. It may contain usage information, categories and other content that is not part of the original template page. This template should not be used in citation templates such as Citation Style 1 and Citation Style 2 , because it includes markup that will pollute the COinS metadata they produce; see ...
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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.
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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.
In geometry, the area enclosed by a circle of radius r is πr 2.Here, the Greek letter π represents the constant ratio of the circumference of any circle to its diameter, approximately equal to 3.14159.
Pie I wish I could determine pi Eureka, cried the great inventor Christmas pudding, Christmas pie Is the problem's very center. Another, more poetic version is: Sir, I have a rhyme excelling, In mystic power and magic spelling, Celestial spirits elucidate, For my own problems can't relate. Extensions to 30 or 31 decimals of the same proceed as ...