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en.wikipedia.org/wiki/Pi

The number π is a mathematical constant. Originally defined as the ratio of a circle's ..... Liu later invented a faster method of calculating π and obtained a value of 3.14 with a 96-sided polygon, by taking advantage of the fact that the differences ...

en.wikipedia.org/wiki/William_Jones_(mathematician)

William Jones, FRS (1675 – 3 July 1749) was a Welsh mathematician, most noted for his use of the symbol π (the Greek letter pi) to represent the ratio of the circumference of a circle to its diameter. ... "William Jones and his Circle: The Man who invented Pi". History Today. Retrieved 2017-10-06. Jump up ^ Roberts, Gareth ...

www.historytoday.com/patricia-rothman/william-jones-and-his-circle-man-who-invented-pi

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

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  ...

www.quora.com/Who-invented-pi-and-zero

Pie -. The history of the constant ratio of the circumference to the diameter of any circle is as old as man's desire to measure; whereas the ...

Mar 14, 2015 ... Anglesey-born William Jones was the first person to use the Greek letter π for the ratio of a circle's circumference to its diameter. But who was ...

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 irrational constant.

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  ...

yousigma.com/interestingfacts/whoinventedpi.html

Aryabhattä gave an accurate approximation for pi (P), as 3.1416 and introduced the inverse sine function into trigonometry.

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