If each side of a square is 10 cm, the perimeter is 4 x 10 cm = 40 cm.
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Oddly enough the perimeter is 16 centimeters.
31 centimeters
The side of the square is equal to the diameter of the circle, in this case 2a so the perimeter is 8a cm.
For a square area = side2; perimeter = 4 x side. side2 = 1225 sq cm => side = sqrt(1225) = 35cm => perimeter = 4 x 35cm = 140cm.
The perimeter is 60 mm