Every person who has ever used the "value" of pi in a calculation has used an approximation.
Pi was discovered ny the ancient Greeks around 1900 B.C
aryabhatta discovered it as 3.1416
Pi is the relationship between the diameter and the circumference of a circle.
No one has fully discovered pi. Pi is believed to be irrational.
gopal
1706
Greece. I think.
Pi-thagoras
dont worry about it
the Greeks
It was not invented it was discovered.