Answer
A=$\frac{1}{2}$$\pi$s$^2$-s$^2$
Work Step by Step
Diameter=s$\sqrt 2$
Radius=$\frac{1}{2}$s$\sqrt 2$
A$_{circle}$=$\frac{1}{2}$$\pi$s$^2$
A$_{square}$=s$^2$
A=A$_{circle}$-A$_{square}$
A=$\frac{1}{2}$$\pi$s$^2$-s$^2$
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