Stiltzkin

If I knew how to derive Pi I could explain this better, but you can look at 1.5 is either 1.5 or 3/2, both meaning the exact same thing. 1.5 is no more or less exact than 3/2, and they are both infinitely precise. So if you look at the equation that derives Pi, that equation is the exact value of Pi, with infinite precision.

Yes it is. In fact, all of mathematics is only an idea. They're called axioms:
http://dictionary.reference.com/search?q=axiom

EDIT: Read 1010011010's post. This is the exact value of Pi: 4/{n[(-1)^(1+n)]}
It doesn't look like you always dreamed it would, does it?

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