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Pi

en.wikipedia.org/wiki/Pi

The number π is a mathematical constant, the ratio of a circle's circumference to its diameter, ... series, was not available until a millennium later, when in the 14th century the Madhava–...

A brief history of pi | PCWorld

www.pcworld.com/article/191389/a-brief-history-of-pi.html

Mar 13, 2013 ... In honor of Pi Day, we bring you a brief history of everyone's favorite ... and its diameter, and it was always there, just waiting to be discovered.

Mathematics: Who discovered pi? - Quora

www.quora.com/Mathematics-Who-discovered-pi

If you mean who introduced the symbol pi in the public it was Euler.The following article though ... William Jones and his Circle: The Man who invented Pi.

The History of Pi - Rutgers University

www.math.rutgers.edu/~cherlin/History/Papers2000/wilson.html

The earliest value of pi used in China was 3. In 263 AD, L iu Hui independently discovered the method used by Bryson and Antiphon, and calculated the ...

Prehistoric Calculus: Discovering Pi – BetterExplained

betterexplained.com/articles/prehistoric-calculus-discovering-pi/

May 29, 2008 ... Archimedes found pi to 99.9% accuracy 2000 years ago — without decimal points ... I wish I learned his discovery of pi in school — it helps us ...

Historical Overview of Pi

www.geom.uiuc.edu/~huberty/math5337/groupe/overview.html

The ancient Babylonians knew of the existence of pi ... During the fith century B.C., Hippias of Elis discovered the quadratrix, a curve which could be used to ...

Pi Day: History of Pi | Exploratorium

www.exploratorium.edu/pi/history_of_pi/

Pi has been known for almost 4000 years—but even if we calculated the number of seconds in those 4000 years and calculated pi to that number of places, we ...

Where Does 'PI' Come From?

britton.disted.camosun.bc.ca/pi/piorigin/piorigin.html

You know what 'PI' is ... it's a number with the value 3.14, and it's used to find the ... Mathematicians who discovered this, thousands of years ago, were amazed!

What is pi, and how did it originate? - Scientific American

www.scientificamerican.com/article/what-is-pi-and-how-did-it/

Succinctly, pi--which is written as the Greek letter for p, or --is the ratio of the circumference of any circle to the diameter of that circle. Regardless of the circle's  ...

pi Facts, information, pictures | Encyclopedia.com articles about pi

www.encyclopedia.com/topic/pi.aspx

pi in mathematics, the ratio of the circumference of a circle to its diameter. ... The person or persons who discovered the constant relationship between a circle's ...

Answer
The earliest known textually evidenced approximations of pi date from around 1900 BCE; they are 25/8 (Babylonia) and 256/81 (Egypt), both within 1% of the true value.
The Greek letter pi was first used to represent the ratio of the circumference of a circle to its diameter in 1709 by mathematician William Jones.
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Who discovered pi in math? | Reference.com

www.reference.com

The identity of the first person to discover that the ratio between the diameter and the circumference of a given circle is a constant will probably never be known.

Who Discovered Pi? - Who Discovered It? - Yukozimo

discovery.yukozimo.com

The discovery of pi lies on a long list of chronology. The history of pi goes back to Ancient Egypt. The earliest application of pi was in Solomon's Temple around ...

William Jones and his Circle: The Man who invented Pi | History Today

www.historytoday.com

William Jones and his Circle: The Man who invented Pi ... The discovery that there are two types of irrational numbers, however, does not detract from Jones's  ...