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Re: In the figure above, a square is inscribed in a circle. If [#permalink]
16 Sep 2012, 23:33

The square is inside the circle, and each of it's sides is 4 since the area is 16. If we create a 45 45 90 right triangle within the square to get the radius of the circle we get \sqrt{2} so just square that and multiply by π and you get 2π