It is a Greek letter used to represent the ratio of the diameter of a circle to its circumference so you can see 'pi' (not a pi)in any circle.
no it is not. See Lindemann, 1882, that pi is transcendental.
To find a number in Pi, see the link below
See the Related Link for "Answers.com: Pi" to the left and below for the answer.
you see pi is easy as pie all you have to do is remember 3.14159265
Pi is the circumference of a circle divided by the diameter of a circle. 3.14 is an approximation of Pi. It is not possible to display the value of Pi. (See the related questions.)
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pi
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If you read the question properly, you will see that the area will be 10 pi.
I don't know how to represent the symbol here on WikiAnswers, but you can see it here: http://en.wikipedia.org/wiki/Pi