12cm (4 sides x 3 = 12)
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For a square, all 4 sides are the same length, so perimeter is 4 times length of a side. So, 4 x 3cm = 12 cm
The perimeter of a rectangle is calculated by adding together the lengths of all its sides. In this case, the rectangle has two sides of length 10cm and two sides of length 3cm. Therefore, the perimeter is calculated as 10cm + 10cm + 3cm + 3cm = 26cm.
A square has 4 sides of equal length The perimeter is the sum of the lengths of the four sides each side has length 3 cm 3+3+3+3 = 12 cm perimeter
Perimeter of a square = 4*side = 4*3 cm = 12 cm.
3*3 = 9 cm