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Pi is the ratio of the circumference to the diameter. The size of the circle doesn't matter because you will always get pi no matter what. Pi never repeats or ends. Pi was named after a greek word that means perimeter and was discovered by a Greek mathematician namd Archemedes. William Jones is the man who decided to first use the Greek letter in 1706. In the 1800s many people sat down for years and found the didgets of pi to around the 1000 place by hand.


pi song

The kind of number that is pi-pi is two times radius and pi is diameter times pi which = circumference