Plane figures?

Find the area of the largest circle which can be cut from a square of edge 4 in. What is the area of the material wasted?
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Radius of largest circle is half the side of the square=2in. Area of circle = (pi)2^2=4(pi) sq in. Area of square=4^2=16 sq in. Area of waste=16-4(pi)=3.434 sq in approximately.
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