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The value of pi to 5 decimal places is 3.14159. Pi is an irrational number, so it cannot be expressed as an exact fraction and its decimal representation has no end.
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.

Pi

en.wikipedia.org/wiki/Pi

History. Main article: Approximations of π. See also: Chronology of computation of π.

Pi Day: History of Pi | Exploratorium

www.exploratorium.edu/pi/history_of_pi/

A Brief History of π. 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 ...

The amazing history of pi - University of Arkansas at Little Rock

www.ualr.edu/lasmoller/pi.html

has a long and interesting history! (Ancient history--More pi history--A novel way to compute pi--The symbol for pi--Having fun with pi--For more information) ...

The History of Pi

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

The History of Pi. David Wilson History of Mathematics Rutgers, Spring 2000. Throughout the history of mathematics, one of the most enduring challenges has  ...

PI - Math.com

www.math.com/tables/constants/pi.htm

A Brief History of Pi Ancient civilizations knew that there was a fixed ratio of circumference to diameter that was approximately equal to ...

Pi history - MacTutor History of Mathematics

www-history.mcs.st-and.ac.uk/HistTopics/Pi_through_the_ages.html

And he made a molten sea, ten cubits from the one brim to the other: it was round all about, and his height was five cubits: and a line of thirty cubits did compass ...

Learn About Pi · Pi Day

www.piday.org/learn-about-pi/

History of Pi. By measuring circular objects, it has always turned out that a circle is a little more than 3 times its width around. In the Old Testament of the Bible (1 ...

Math Forum: Ask Dr. Math FAQ: About Pi

mathforum.org/dr.math/faq/faq.pi.html

Explains what the constant is and a brief history. Includes resource links.

A History of Pi: Petr Beckmann: 9780312381851: Amazon.com: Books

www.amazon.com/A-History-Pi-Petr-Beckmann/dp/0312381859

A History of Pi [Petr Beckmann] on Amazon.com. *FREE* shipping on qualifying offers. The history of pi, says the author, though a small part of the history of ...

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