Question 1057868
Since the diameter of the circle will be the same length as the side of the square, the radius of the circle will just be one-half of the side of the square:

{{{ r=(1/2)*28cm = 14cm }}}

…and the area is just {{{ A = (pi)r^2 }}}

{{{ A= (pi)*14^2 = 615.75 }}} cm^2