[Bush2000]

The reason that pi can be calculated to an infinite number of decimal places is easy to see if you visualize it in the equation for calculating the area of a circle:

A = pi * radius²

If you're familiar with Bresenham's algorithm and you relate it to the contour of a circle, you know that it's very difficult to draw a perfect circle. In one sense, you could argue that no perfect circle has ever been created because the precision required to draw one is beyond our capabilities. The "fluff" (or extra precision) in pi is a reflection of that reality.

[Robert A Cook PE]

Oh sure, go ahead and use "fluffy" logic on us. 8<)

By the way, do you measure the inside or or the ouside of that cicumference?

In the EU, do you get arrest if you don't use the metric value of a dozen pie?