In a rectangle multiply the two dimensions and get the area. 23 times 12 equals 276 square feet.
12
Six four by eight sheets of plywood.
It is a rectangle and its perimeter is 12+12+6+6 = 36 feet
72inches
22 x 12 = 264 square feet
144 ft squared.
12
Six four by eight sheets of plywood.
It is a rectangle and its perimeter is 12+12+6+6 = 36 feet
20 square yards
72inches
There are: 16 times 12 = 192 square feet
22 x 12 = 264 square feet
72
12 x 40 = 480 square feet
2160ft2
216