PiTim


 * What is Pi**

3.1415926535897932384626433832795028841971693993751058209 7494459230781640628620899862803482534211706798214808651 3282306647093844609550582231725359408128481117450284102 7019385211055596446229489549303819644288109756659334461 2847564823378678316527120190914564856692346034861045432 6648213393607260249141273724587006606315588174881520920 9628292540917153643678925903600113305305488204665213841. These are the the first in the endless digits of Pi.

**Who discovered Pi** William Jones introduced it 1706. He was not the first person to come up with it though. Many cultures already had a similar number. Many formulas use Pi, here is a list of them.
 * These cultures were**
 * Egyptians
 * Greecians
 * Babylonians
 * Formulas that use Pi**
 * 1) Circumference C=**πd or C=2πr**
 * 2) area of a circle A=**πr²**
 * 3) surface area of a cylinder S= 2**πr²**


 * How to calculate pi**

To calculate pi divide circumference by diameter of a circle.


 * Links **
 * 1) **[|Pi search]** (search numbers in pi)
 * 2) [|pi song]