Ah, the perimeter is like a warm hug around a shape, adding up all the sides together. For a shape with sides of 12 cm each, the perimeter would be 12 cm + 12 cm + 12 cm + 12 cm, which equals 48 cm. Just imagine those sides coming together in a peaceful harmony, creating a perfect boundary.
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The answer is 12 cm.
Perimeter of a square = 4*side = 4*3 cm = 12 cm.
square must be 3 x 3 so perimeter is 12 cm.
48 cm
12