Diagonal = 18*sqrt(2) = 18*1.414214 = 25.45584 feet
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18 x 7 = 126 square feet
18 and two thirds square yards
To calculate the area in square feet, you first need to convert the dimensions to feet. Since 1 foot is equal to 12 inches, 18 inches is equal to 1.5 feet. Therefore, 18 inches by 18 inches equals 1.5 feet by 1.5 feet, which is 2.25 square feet.
sqrt(324) = ±1818the square root is 18
Area is length x width. 12 x 18 = 216, so the shop has 216 square feet