What is Pi?

Date: 11/9/95 at 4:14:15
From: Anonymous
Subject: TEST

What is pi?  Please respond to above address.

Date: 11/9/95 at 11:34:45
From: Doctor Ethan
Subject: Re: TEST

Hello,

   Pi is defined to be the ratio between the diameter and the
circumference of a circle.  It has lots of crazy properties that
really intrigued the ancient Greeks who studied it.

The main one is that it is irrational.

This means that it cannot be written as a finite or a repeating 
decimal.

(The normal way that is taught is that it cannot be written as the 
ratio of two numbers).  It is approximately equal to 3.14159

Hope that helps.

-Doctor Ethan,  The Geometry Forum