The area is 49 because the square has 4 sides, 4s=28 s=7 and the areas is s^2 so 7^2=a 49=a.
49
A square has 4 sides and the perimeter is 28, so each side is 7 feet (perimeter is the sum of all the sides). area is length x width so 7 x 7 = 49
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