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"regular feet" are one-dimensional measurements. Square feet are measures of area--two dimensional measurements. A square foot is a square that has foot long sides. 9 square feet are the area equivalent of 9 square feet.
Square root of the area.
56 square feet is the area of 56 square feet a square foot is unit used to measure area. For example something could be 5 feet long, but it couldn't be 56 square feet long. A foot is a measurement of length, and a square foot is a measurement of area.
I don't since a square foot is a measure of area whereas a yard is a measure of length.However, in 1 square yard there are 9 square feet:1 yard = 3 feet1 square yard = 1 yard x 1 yard (the area of a square with sides 1 yard)= 3 feet x 3 feet= 9 square feet
728 square feet. To calculate square feet simply multiply length by width - the result is the area in square feet.