The area is 15*20 = 300 square feet.
21
676 feet
30 square feet
216
You have to multiply the two dimensions to get the area. In this case the answer will be 222.75 square feet.
You calculate square feet by muliplying the length of something by its width. for example a room 12 feet long by 9 feet wide would have an area of 12 x 9 square feet, which is 108 square feet.
21
16 feet long and 3 feet wide is 4.46 square meters.
15 square feet
450 square feet.
676 feet
Area is calculated by multiplying width x length. Thus the square feet in an area 20 feet wide by 24 feet long is 20 x 24 = 480 square feet.
25.4125 feet
9x4= 36 feet squared
6 square feet.
30 square feet
The area would be 6 square feet and the perimeter would be 10 feet.