# Area of a square using circle

So I have this square and theres a circle inside of it. The circle of radius $r$ is inscribed in the square. So how do I find the area of the square in terms of $r$? I know that area of a circle is $\pi r^2$, but they wouldn't give me the area of the parts of the square the circle doesn't cover. any help?

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@Ronnie: Close, but not quite. The side length $s$ of the square is equal to $2r$, but $$\text{area of square} = s^2=(2r)^2=(2\times r)\times (2\times r)=4\times r\times r = 4r^2$$ not $2r^2$. –  Zev Chonoles Sep 20 '11 at 1:45