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Pi

   One of the most interesting number to consider is "pi", normally known as a value around 3.14.

     Pi is derived from the relationship of circumference of a circle to its diameter.  If you carefully measure the circumference of several circles and then measure their respective diameters, the ratio of  C/d will approach 3.14.  Thus we can derive the corollary   that C = 3.14 * d.

    Pi is also used in calculating the area of a circle.

     But pi is not just used in circles.  As a matter of fact, it pops up in quite a few places. 

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