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Perimeter of 12" by 8" = 12+8+12+8 = 40 inches.
The perimeter of a 6 feet by 8 feet quadrilateral is 28 feet. Or 336 inches.
You can't tell the perimeter from the area.Here are a few different rectangles and their perimeters.All of them enclose 12 square feet.1/2 x 24 .. . perimeter = 491 x 12 . . . . perimeter = 261.5 x 8 .. . . perimeter = 192 x 6 . . . . . perimeter = 162.4 x 5 .. . . perimeter = 14.83 x 4 . . . . . perimeter = 143.464 x 3.464 . . perimeter = 13.856
The perimeter would be (12 + 8) x 2 which is 40.
A rectangle measuring 12 inches by 8 inches has a perimeter of 40 inches, since 12 + 12 + 8 + 8 = 40 inches.