From: paperwarior | #019
The first thing that comes to mind is that you'd have to use 0.5 tau r^2 for the area of a circle, but maybe that's less significant to science and math.
Section 3 of the opening article. You can argue that form is actually more appropriate since it parallels equations of a similar form (1/2 * constant * squared term) that result from integrations analogous to that which gives you the circle area formula.
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No amount of planning will ever replace dumb luck.