The perimeter of a square of known area is 4 x sqrt area, in this case 4 x 10 = 40 cm.
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4 by 100
100 cm(2). (2) means squared
100 squared (100 x 100) = 10,000
The area of a square is one length squared. In this case this means 10 squared which 100, so the answer is 100cm2
Area of a square = side^2 10,000 = side^2 100 = side Perimeter = 4(side) = 4 x 100 = 400 cm