Area can't be measured in "inches", and a square doesn't have a "radius".
Aside from those minor picky details, this is a very exciting question.
If we may be permitted to create a somewhat similar question that actually has answers . . .
If the area of a square is 72 square inches, then the length of one of its sides is 6 sqrt(2) = 8.485 inches (rounded)
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Area = 3.14*72 = 153.86 square inches
No Radius in a SquareA radius is a feature of a circle, not a square. A square, whatever its area, does not have a radius.
Area = 22/7*72 = 154 square inches
Area of square: 324 square inches Perimeter of square: 72 inches
If you mean a circle then:- radius = sq rt of (72/pi) = 4.787 inches to 3 decimal places