72/4 = 18. Each side of the square is 18, so 18 x 18 = 324. 324 is the area.
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72 because if the area is 324 and you make a block chart and count the sides it will equal 72
72
The square root of 324 is 18 so the perimeter must be 4*18 = 72 cm
The perimeter of a square is calculated by adding the lengths of all four sides together. Since all sides of a square are equal in length, you can multiply the length of one side by 4 to find the perimeter. In this case, if the square is 72 centimeters on each side, the perimeter would be 72 cm x 4 = 288 cm.
A square with an area of 400 square units has a perimeter of 80 units.