Consider a regualar dodecagon ABCDEFGHIJKL inscribed in a circle of radius and center $O$ Then $OA=OC=AC$ form an equilateral triangle., and the kite $ABCO$ has area $1/4$. there are $4$ kits like this in the dodecagon, so the area es $3<\pi$. I know this is known result, but not very well-kno...
There are certain questions that ask about finding an object find certain property, usually some large number. Now to me it is on the edge of what this site is about, as the question is not really about understanding the math, but rather asking for help with computation (although sometimes an asw...
Proposal: Changing the tag name to something more descriptive might make it clearer to the user what the tag is intended for and thus incorrect use will be less likely. (And thus reducing the frequency of this problem in the future.) I would suggest divergence-vector-calculus or divergence-vector...
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