The History of Pi
Pi
3.141592653589793238462643383279502884197169399375105820974944592307816406286208998628034825342117067
William Jones and his Circle: The 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 be approached, but never reached.
The Babylonians...
estimated pi to be about 25/8 (3.125).
The Egyptians...
estimated pi to be about 256/81 (roughly 3.16).
The Ancient Greek mathematician Archimedes of Syracuse...
is largely to be considered to be th e first to calculate an accurate estimation of the value of pi.