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

circle radius=1, half circumference=pi. Draw a circle with a radius of 1. The
distance half way around the circle is 3.14159265... a number known as Pi ...

www.piday.org/million/

Pi Day. Celebrate Mathematics on March 14th. 55 Days 20 Hours. Home · Learn
... One Million Digits of Pi ... Pi Sightings: How People Celebrated Pi Day 2010.

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.math.rutgers.edu/~cherlin/History/Papers2000/wilson.html

The History of Pi. David Wilson History of Mathematics Rutgers, Spring 2000.
Throughout the history of mathematics, one of the most enduring challenges has
...

mathforum.org/dr.math/faq/faq.pi.html

What is Pi? Who first used Pi? How do you find it? What is it for? How many digits
is it?

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.ask.com/youtube?q=Pi Math&v=VWGGTb5pY2U

Mar 27, 2010 ... O boy iz dat tiem of yeer agin!!111!! This is a music video of the song "
Mathematical Pi" by Ken Ferrier and Antoni Chan. You can find out more ...

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 ...