You get the least perimeter of a rectangle when you draw
a square around the area.
If the area is 32 square feet, then each side of the square
is √32 feet. That's 4√2 feet.
So the perimeter (all around all 4 sides) is 16√2 = about 22.6 feet.
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There IS a way to get a shorter perimeter around the same area,
but not with a rectangle, or any number of straight sides.
If you do it with a CIRCLE, then the radius of the circle
is about 3.19 feet, and the perimeter (circumference) is
about 20.05 feet ... about 11% shorter than the perimeter
of the square.