Question 203091
Looking  at  square,, A=s^2 =64,,therefore  s=8
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Diagonal  of  the  circle  is,,,,dia^2 = s^2 +s^2 = 2s^2,,,d=sqrt(2s^2)=ssqrt2 =8sqrt2
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Diagonal  is  diameter  of  the  circle,  therefore  dia  = 8sqrt2
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area  circle  = pi * r^2 = pi * (dia /2)^2 = pi * (8sqrt2)^2/4 = 100.53 cm^2
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Assuming  shaded  area  is  that  between  circle  and  square,
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A(shaded) = A(circle)- A(square)= 100.53-64 = 36.53 cm^2