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?
Hint: Think about the relationship between the radius of the circle, the diameter of the circle, and the side length of the square.
Do you know the area of a square given its side length?