The babylonians first discovered the ratio compared to the diameter and circumference of a circle.
Later, Archimedes(287-212BC) discovered and proved his theory of pi.
Pi to 27 decimal places:
3.141592653589793238462643383
The square root of pi (to 30 decimal places) is:
1.772453850905516027298167483314
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PI the 16th greek letter is the circumference divided by the diameter of a circle. For example 40.5/12.89 = PI.
3.14 is short for pi. Pi can go on forever and ever. It's just a rounded number of pi to make things easier to understand.
3.1415926535897932384626433832795…
The Greek alphabet.
Greek.