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Pi, written as Π or π, is the 16th letter in the Greek Alphabet.
Letters of the Greek Alphabet:

Pi

en.wikipedia.org/wiki/Pi

It has been represented by the Greek letter "π" since the mid-18th century, though it is also sometimes spelled out as "pi" (/paɪ/). Being an irrational number, ...

What Is Pi? | Wonderopolis

wonderopolis.org/wonder/what-is-pi/

Before we can learn more about pi, it will help if we review a bit of geometry. In particular, we need to brush up on circles. Why? Well, we'll get around (pun ...

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?

Pi - Math is Fun

www.mathsisfun.com/numbers/pi.html

Draw a circle with a radius of 1. The distance half way around the edge of the circle will be 3.14159265... a number known as Pi ...

What is Pi? - LiveScience

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 - 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  ...

www.ask.com/youtube?q=What Is Pi?&v=wNcFAQHJWAU
Dec 16, 2011 ... (π explained) a brief explanation of the constant Pi Pi=3.14159265... C = circumference = perimeter D = diameter = line dividing circle in half R..

Pi Day · Celebrate Mathematics on March 14th

www.piday.org/

Pi Day is celebrated on March 14th (3/14) around the world. Pi (Greek letter “π”) is ... Pi has been calculated to over one trillion digits beyond its decimal point.

pi to 10,000 digits - Department of Mathematics, University of Utah

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

pi=3.14159 26535 89793 23846 26433 83279 50288 41971 69399 37510 58209 74944 59230 78164 06286 20899 86280 34825 34211 70679 82148 08651 ...

Popular Q&A
Q: What is pi?
A: What you get when you divide the circumference of a circle by its diameter. Read More »
Source: answers.yahoo.com
Q: What is pi?
A: pi (π) is an irrational number representing the ratio between the circumference of a circle and its diameter. It is used in many equations (e.g. circle area, sp... Read More »
Source: wiki.answers.com
Q: What is PI?
A: abbr. private investigator Read More »
Source: www.answers.com
Q: What is 'pi?
A: By definition, pi is the ratio of the circumference of a circle to its diameter. Pi is always the same n... Read More »
Source: www.chacha.com
Q: What is pi for?
A: it is used to calculate the area and volume of a circle or cylinder. also to find circumference. EX: DIAMETER X PI = CIRCUMFERENCE. Read More »
Source: wiki.answers.com