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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.



A photograph of the Greek letter pi, created as a large stone mosaic embedded in .... Liu later invented a faster method of calculating π and obtained a value of ...

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


In 1706 a little-known mathematics teacher William Jones first used a symbol to represent the platonic concept of pi, an ideal that in numerical terms can be ...

Pi Day 2015: meet the man who invented π | Science | The Guardian


Mar 14, 2015 ... Pi Day 2015: meet the man who invented π. Gareth Ffowc Roberts. Anglesey- born William Jones was the first person to use the Greek letter π ...

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


May 17, 1999 ... 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.

Where Does 'PI' Come From?


But did you ever wonder where PI came from? Did somebody make it up? Was it invented? Where does it come from!? PI is a truly magical number! The symbol ...

The History of Pi


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

Why Was Pi Invented? - Math Forum - Ask Dr. Math


Date: 04/10/2003 at 05:49:07 From: Katharine Subject: Pi - why was it even invented?? Dr. Math, I don't understand why pi was invented in the first place. I know ...

The Straight Dope: Who invented pi?


Sep 17, 2002 ... Dear Straight Dope: Hey for my Algerbra class, our teacher told us that we could get extra credit if we told him Who Invented Pi (mathmatically ...

Pi Day: History of Pi | Exploratorium


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 ...

Popular Q&A
Q: Who invented pi?
A: Pi (3.14) has been known for so long that it is quite untraceable. The first theoretical calculation seems to have been carried out by Archimedes of Syracuse. Read More »
Source: www.kgbanswers.com
Q: Who invented pi?
A: I used to have a book can A History of Pi by Petr Beckmann. In that book he talked about the Egyptians calculating pi so it's at least that old. Although they d... Read More »
Source: answers.yahoo.com
Q: Who invented pi?
A: Hey for my Algerbra class, our teacher told us that we could get extra credit if we told him Who Invented Pi (mathmatically speaking) so I thought this would be... Read More »
Source: www.straightdope.com
Q: Who invented pi?
A: Hi: To answer your question you need to know what pi is : It is the ratio of a circle's circumference to it's diameter. it a constant number that never changes ... Read More »
Source: ph.answers.yahoo.com
Q: Who invented pi?
A: As a mathematical constant, no-one can be said to have invented pi. However the relationship can be said to have been realised to exist and used and exploited f... Read More »
Source: www.tellmehowto.net