Pi - Math is Fun
https://www.mathsisfun.com/numbers/pi.html
Draw a circle with a diameter (all the way across the circle) of 1. Then the circumference (all the way around the circle) is 3.14159265... a number known as Pi.Pi - Wikipedia
https://en.wikipedia.org/wiki/Pi
Jump to Role and characterizations in mathematics - The number π (/ˈpaɪ/) is a mathematical constant, the ratio of a circle's circumference to its diameter. It is approximately equal to 3.14159. It has been represented by the Greek letter "π" since the mid-18th century, though it is also sometimes spelled out as "pi".
You visited this page on 9/15/17.
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