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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

Any complex number, say z, can be expressed using ... In the polar coordinate system, one number ...

One Million Digits of Pi · Pi Day

www.piday.org/million/

One Million Digits of Pi. 3.14... more digits loading... T-Shirts. More Pi Stuff. psych · Pi Sightings: Pi's cameo appearance in “Psych” Season 4 Finale · sample.

100,000 Digits of Pi

www.geom.uiuc.edu/~huberty/math5337/groupe/digits.html

100,000 Digits of Pi Pi Logo. 3.141592653589793238462643383279502884197169399375105820974944592307816406286  ...

The First Thousand Digits of Pi - Fact Monster

www.factmonster.com/ipka/A0876705.html

The number known as pi (π) has fascinated people for millenia. The digits to the right of its decimal point can keep going forever, and there is absolutely no ...

6 Things You Probably Didn't Know About Pi | WIRED

www.wired.com/2016/03/six-things-probably-didnt-know-pi/

Mar 14, 2016 ... No matter how big your circle, the ratio of circumference to diameter is the value of Pi. Pi is an irrational number—you can't write it down as a ...

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 ...

What Makes Pi So Special? | What Does Pi Mean? - Live Science

www.livescience.com/34132-what-makes-pi-special.html

Aug 9, 2012 ... No number can claim more fame than pi. But why, exactly? Defined as the ratio of the circumference of a circle to its diameter, pi, or in symbol ...

What is Pi? - Live Science

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

Apr 30, 2013 ... Pi represents the ratio of the circumference of a circle to its diameter. Pi is an irrational number that never ends; the decimals go on forever and ...

Pi -- from Wolfram MathWorld

mathworld.wolfram.com/Pi.html

Pi. DOWNLOAD Mathematica Notebook EXPLORE THIS TOPIC IN the MathWorld Classroom CirclePi. The constant pi, denoted pi , is a real number defined as ...