Since a square has four sides and the perimeter is the sum of the four sides, just divide the perimeter length by four: 220 / 4 = 5.5 dm
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The perimeter is found by adding the length of each side. The area is found by multiplying the length of the square by the width.
7 cm
Hint: the perimeter of a square is the sum of its four sides, so each side is one-quarter of the perimeter...
Perimeter is 100', so each side = 25' and 25 squared = 625. QED
13 feet