find the area of a square whose perimeter is 36 cm
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perimeter= 36 cm
=> 4 × side = perimeter of a square
=> 4 × x = 36 cm
=> x = 36/4 cm
=> x = 9 cm
therefore, side = 9 cm
now,
area = side× side
= 9 × 9 cm²
= 81 cm²
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