Question 354138
the side of the square =diameter of the circle or 2*radius
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area of circle = {{{308=pi*r^2}}} therefore {{{r=Sqrt(308/pi)=9.8}}} I am using pi=3.142
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side of square ={{{2*r=19.6}}}
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diagonal of a square (forming a 90-45-45 triangle, the diagonal is the hypothenus={{{sqrt(2)*side=sqrt(2)*19.6=27.7}}}