pi(Î ) is the ratio of circumfernce of the circle to the diameter of it i.e Î /D where D is daimeter.
If you take any circle in the universe circumfrence to the pi ratio will always be constant whick is equal to 3.14159265...... and so on.It never cease, it's an infinite non-repeating natural numbers. It is approximately equal to 22/7.
pi is one the most astonishing number i have ever seen excpect exponential i.e e.
No one know who discovered pi as it can traces in many different religion as the origin is very old.
i hope it will give u some intitution what is pi.
P.s note that 22/7is note equal to Î .
and sorry for my bad english.
