Who Invented Pi?
The symbol π, which is the Greek letter (Pi), was not invented; it would be more properly stated that Pi was discovered. Euclidean geometry, attributed by Greek mathematician Euclid was the first recorded system used to show Pi as a mathematical constant. Pi is approximately equal to 3.14159, which is also referred to the constant circumference. William Jones used the name Pi for the Greek letter meaning the perimeter in 1706, and at a later time referred more often by Leonhard Euler.
Who Invented Pi? Well if it had to be accredited to one person it would have to be Euclid.