Feet can't be converted to square feet. Feet measure length, while square feet measure area.
If the area of the garden is 81 square feet and the perimeter is 36 feet, the solution is that the garden is a square 9 feet x 9 feet, where 4 x (side) =36.
12 feet square equals 124 square feet garden 11ftx11ft equals 121 square ft garden
A square garden shape of 25 square feet could be 5 feet long by 5 feet width. There are other possibilities.
Feet measure length, square feet measure area. Your question has no answer.
Feet can't be converted to square feet. Feet measure length, while square feet measure area.
16 square feet
Then each side of the garden is 5 feet in length.
It is 12 square feet
If the area of the garden is 81 square feet and the perimeter is 36 feet, the solution is that the garden is a square 9 feet x 9 feet, where 4 x (side) =36.
12 feet square equals 124 square feet garden 11ftx11ft equals 121 square ft garden
Each side is 5.5 feet and 4 times 5.5 = 22 feet which is the perimeter of the garden
Measure its side in terms of feet. Multiply that measure by itself to give the area in square feet.
A square garden shape of 25 square feet could be 5 feet long by 5 feet width. There are other possibilities.
Feet is a measure of length, square feet is a measure of area. The two can not be equated.
Feet measure length, square feet measure area. Your question has no answer.
Square feet are square feet. There is not a measure called radius square feet.