(b2)/2
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one (half acre) = 21 780 square foot
One square kilometer is 247.11 acres. Half that is 123.6 acres.
Area of a square = side2 Square A area = a2 Square B area = (4a)2 (4a)(4a) = 16a2 The area of square B is sixteen times the area of square A. Proof: Side of square A = 2 inches Side of square B = (4*2) = 8 inches Area of A = 22 = 4 square inches Area of B = 82 = 64 square inches 64 / 4 = 16
2024 square metres approx
A number to the one half power is the square root.