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Pi (/ˈpaɪ/; Ancient Greek /piː/ or /peî/, uppercase Π, lowercase π, cursive ϖ; Greek: πι) is the sixteenth letter of the Greek alphabet, representing the voiceless bilabial plosive IPA:. In the system of Greek numerals it has a value of 80.
A History of Pi (book) Indiana Pi Bill; Leibniz formula for pi; Lindemann–Weierstrass theorem (Proof that π is transcendental) List of circle topics; List of formulae involving π; Liu Hui's π algorithm; Mathematical constant (sorted by continued fraction representation) Mathematical constants and functions; Method of exhaustion; Milü; Pi ...
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.
This category includes articles related to the mathematical constant pi (π), which represents the ratio of a circle's circumference to its diameter. For other uses, see Pi (disambiguation) . The main article for this category is Pi .
The word is a play on the word "pi" itself and of the linguistic field of philology. There are many ways to memorize π, including the use of piems (a portmanteau, formed by combining pi and poem), which are poems that represent π in a way such that the length of each word (in letters) represents a digit. [1]
Calculated pi to 72 digits, but not all were correct 71: 1706: John Machin [2] 100: 1706: William Jones: Introduced the Greek letter ' π ' 1719: Thomas Fantet de Lagny [2] Calculated 127 decimal places, but not all were correct 112: 1721: Anonymous Calculation made in Philadelphia, Pennsylvania, giving the
latin capital letter a with diaeresis Å u+00c5: 143: 0197: latin capital letter a with ring above Æ u+00c6: 146: 0198: latin capital letter ae Ç u+00c7: 128: 0199: latin capital letter c with cedilla È u+00c8: 212: 0200: latin capital letter e with grave É u+00c9: 144: 0201: latin capital letter e with acute Ê u+00ca: 210: 0202: latin ...
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