Web Results

## Pi

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 - Math is Fun

www.mathsisfun.com/numbers/pi.html

all the way around the circle) will be Pi. Pi (the symbol is the Greek letter π) is: ... In fact π is not equal to the ratio of any two numbers, which makes it an irrational  ...

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

What is pi ( )? Who first used pi? How do you find its value? What is it for? How many digits is it? By definition, pi is the ratio of the circumference of a circle to its ...

## Learn About Pi · Pi Day

Pi (π) is the ratio of a circle's circumference to its diameter. Pi is a constant number, meaning that for all circles of any size, Pi will be the same. The diameter of a ...

## Value Of Pi

c2.com/cgi/wiki?ValueOfPi

Seriously, it does make sense to define "pi" as a defined constant - not because ... The text states, "the ratio of the diameter and circumference is as five-fourths to  ...

## Pi, a Very Special Number : nrich.maths.org

nrich.maths.org/2490

Read all about the number pi and the mathematicians who have tried to find out its value as ... is the ratio of the circumference of a circle to its diameter.

## 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  ...

## Why is Pi (actually) Important

www.angio.net/pi/whypi.html

Pi (π) is the ratio of the circumference of a circle to its diameter. It doesn't matter how big or small the circle is - the ratio stays the same. Properties like this that ...

## MathSteps: Grade 6: Pi: What Is It? - Education Place

eduplace.com/math/mathsteps/6/g/index.html

Pi. There are many fascinating numbers in mathematics. One of the most interesting number relationships that students can discover in geometry is that the ratio ...

## Where Does 'PI' Come From?

britton.disted.camosun.bc.ca/pi/piorigin/piorigin.html

You know what 'PI' is ... it's a number with the value 3.14, and it's used to find the circumference and area of a circle. But did you ever wonder where PI came ...

### What Is Pi? | Wonderopolis

wonderopolis.org

Pi is the ratio of a circle's circumference to its diameter. ... Pi is also an irrational number, which means that its value cannot be expressed exactly as a simple ...

### What is Pi? - Live Science

www.livescience.com

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 ...

### The History of Pi

www.math.rutgers.edu

The ratio of pi to 3 is very close to the ratio of 111 to 106. In other words, pi/3 = 111/106 approximately; solving for pi, we find pi = 3.1415094... (Tsaban, 78).