The radius of the circle=4√2 feet.
The diameter of the circle=8√2feet.
The diameter of the circle=The hypotenuse of a triangle whose other sides are identical.
According to pythagoras theory
2×(side of square)2=(hypotenuse)2
Side of square =√{(8√2)2/2}=8feet.
The perimeter of garden =perimeter of square=4×side of square=32 feet.