Question 316655
{{{drawing(300,300,-10,10,-10,10,circle(0,0,0.3),circle(0,0,7),line(7,7,7,-7),line(-7,-7,-7,7),line(7,7,-7,7),line(7,-7,-7,-7),line(0,0,7,0),locate(3,1,R),locate(0,8.2,s))}}}
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{{{R=s/2}}}
{{{S=2R=28}}}
For the circle,
{{{A=pi*R^2=(22/7)(14)^2=616}}}
For the square, 
{{{A=(28)^2=784}}}