Who Invented Pi?

Pi is a mathematical constant. It is a ratio of a circle's diameter to its circumference and is approximately 3.14159. There is no known record as to who first invented the pi , however it is believed to have been first used by the Greek people in 250 BC.
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.
First, pi is not an invention, it is a discovery. In fact it was Archimedes was the first to prove and understood that the two ratios were equivalent.
Q&A Related to "Who Invented Pi?"
 We use pi all of the time, but where does pi really come from? Pi has been used for thousands of year, and it's number is 3.14159. It is attributed to Ahmes, the Egyptian scholar. http://answers.ask.com/Science/Mathematics/who_inv...
 It was discovered by the fact that the circumference of any circle when divided by its diameter is equal to pi. The earliest evidenced conscious use of an accurate approximation for http://wiki.answers.com/Q/How_was_pi_invented
 Pi was chosen as the letter to represent the number 3.141592. because the pi in Greek, http://www.chacha.com/question/how-was-pi-in-math-...
 Pi 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. http://www.kgbanswers.com/who-invented-pi/4884083
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We use pi all of the time, but where does pi really come from? Pi has been used for thousands of year, and it's number is 3.14159. It is attributed to Ahmes, the ...
We use pi all of the time, but where does pi really come from? Pi has been used for thousands of year, and it's number is 3.14159. It is attributed to Ahmes, the ...
We use pi all of the time, but where does pi really come from? Pi has been used for thousands of year, and it's number is 3.14159. It is attributed to Ahmes, the ...