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.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.piday.org/million/

Menu. Pi Day. Celebrate Mathematics on March 14th. 54 Days 19 Hours. Home ·
Learn About Pi · Shop · Videos · News & Events · Pi Sightings · All Things Pi.

www.piday.org/2010/mathematical-pi-song/

Mathematical Pi Song. February 15, 2010 · Videos · ∞ ... Post navigation. ← Pi(
ano) Song · Pi's cameo appearance in “Psych” Season 4 Finale → · T-Shirts ...

www.ask.com/youtube?q=Math Pie&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.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,
...

encyclopedia2.thefreedictionary.com/Pie (math)

pi,. in mathematics, the ratio of the circumference of a circle to its diameter. The
symbol for pi is π. The ratio is the same for all circles and is approximately 3.1416
...

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 ...