No. Square centimeters refer to an area covered, while just plain centimeters refer to a length (like a line). The perimeter of a shape is linear, so it's referred to just in cm.
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The perimeter is 120 cm
169cm squared
12
P = 48cm
Area = 49 cm2 so side = sqrt(49) cm = 7 cm and therefore, perimeter = 4*side = 28 cm.