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The value of pi to 5 decimal places is 3.14159. Pi is an irrational number, so it cannot be expressed as an exact fraction and its decimal representation has no end.
The Greek letter pi was first used to represent the ratio of the circumference of a circle to its diameter in 1709 by mathematician William Jones.

Pi - Wikipedia

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 ...

pi to 10000 digits - University of Utah Math Department

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.ask.com/youtube?q=Mathematical Pi&v=VWGGTb5pY2U
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Oct 27, 2007 ... Lyrics: A long, long time ago Long before the Super Bowl and things like lemonade The Hellenic Republic was full of smarts and a question ...
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Pi - Math is Fun

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 ...

Definition of Pi - Math is Fun

www.mathsisfun.com/definitions/pi.html

Math explained in easy language, plus puzzles, games, quizzes, worksheets and a ... Pi. more ... Pi. The ratio of a circle's circumference to its diameter. Equal to ...

Pi - Math.com

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  ...

Math Forum: Ask Dr. Math FAQ: About Pi

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?