In a rectangle, the opposite sides are equal, so two sides are 11 ft and the other two are 21 ft. To find the perimeter of a rectangle, you only have to add up all sides. So it's 11 + 11 + 21 + 21 = 64 ft
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2 ft
46 ft.
18??
A 4 ft by 9 ft rectangle
The rectangle is 6-ft long and 4-ft wide.