If a wire is bent into the shape of a square, its area is 81 sq. cm. When the wire is bent into a semi-circular shape, what is its area?

If a wire is bent into the shape of a square, its area is 81 sq. cm. W

1.	If a wire is bent into the shape of a square, its area is 81 sq. cm. When the wire is bent into a semi-circular shape, what is its area?
A.	\[70\text{ }c{{m}^{2}}\]
B.	\[~77\text{ }c{{m}^{2}}\]
C.	\[~72\text{ }c{{m}^{2}}\]
D.	\[~64\text{ }c{{m}^{2}}\]
Answer» C. \[~72\text{ }c{{m}^{2}}\]

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If a wire is bent into the shape of a square, its area is 81 sq. cm. When the wire is bent into a semi-circular shape, what is its area?

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