en.wikipedia.org/wiki/Pi

The number π is a mathematical constant, the ratio of a circle's circumference to its diameter, commonly approximated as 3.14159. It has been represented by ...

www.math.utah.edu/~pa/math/pi.html

Understanding Mathematics by Peter Alfeld, Department of Mathematics, ... pi= 3.14159 26535 89793 23846 26433 83279 50288 41971 69399 37510 58209 ...

www.mathsisfun.com/numbers/pi.html

To help you remember what it means just draw this diagram. Finding Pi Yourself. Draw a circle, or use something circular like a plate. Measure around the edge ...

www.piday.org/million

One Million Digits of Pi. 3.... Pi Coffee Mug. More Pi Stuff. Videos: Mathematical Pi Song · General: Car Odometer hits Pi on Pi Day · Digits: Pi Day Clock.

www.math.com/tables/constants/pi.htm

Pi is a name given to the ratio of the circumference of a circle to the diameter. That means, for any circle, you can divide the circumference (the distance around ...

www.mathopenref.com/pi.html

The number Pi, denoted by the Greek letter π - pronounced 'pie', is one of the most common constants in all of mathematics. It is the circumference of any circle, ...

www.livescience.com/29197-what-is-pi.html

Apr 30, 2013 ... Pi (π), the 16th letter of the Greek alphabet, is used to represent the most widely known mathematical constant. By definition, pi is the ratio of the ...

mathworld.wolfram.com/PiFormulas.html

th term of this series in the Gregory series is larger than (2n)^(-1) so this sum converges so slowly that 300 terms are not sufficient to calculate pi correctly to two ...