49 square centimetres.
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7*7 = 49 square cm
Area = 49 cm2 so side = sqrt(49) cm = 7 cm and therefore, perimeter = 4*side = 28 cm.
It is: 4*7 = 28 cm
If a square has an area of 151.29cm2 its perimeter is: 49.2 cm
The perimeter of a square, if it has an area of 25 cm, is: 20 cm