20 x 20 = 400 square feet.
20 ft
2.78 square feet.
20 x 19 = 380 square feet.
12 x 20 = 240 square feet.
There are: 0.5*8*5 = 20 square feet
8.944 feet
The area of a triangle: A = (1/2)bh A = (1/2)(20)(50) = 500
20 x 20 = 400 square feet.
20 ft
400 square feet.
Do you mean a real square with the side length of 20 feet? Then 20 feet times 20 feet is 400 square feet.
400 square feet
2.78 square feet.
20 x 19 = 380 square feet.
12 x 20 = 240 square feet.
13 x 20 = 260 square feet.