For square footage (area) you only have two measurements. So a carpet 4 ft x 4 ft has a square footage of 16 square feet. And a carpet of 4 ft x 8 ft has a square footage of 32 square feet.
Three measurements like 4 ft x 4 ft x 8 ft give you cubic footage, or volume. So the volume of a container that size would be 128 cubic feet.
8-ft x 4-ft = 32 square feet
A 53-foot trailer holds 3816 cubic feet of air (8' wide by 9' high by 53' long). The floor space on an 8' x 53' trailer would be 424 sq. ft.
10 ft x 8 ft = 80 square feet.
Pi x D2 / 4 = area ft2 = 3.142*8*8/4 = 50.272 square yard = 9 sqr ft (3*x3) thus 50.272/9 sqr yrds in 8 ft diameter = 5.586
Just multiply the two numbers together. This means it covers 32 square feet.
4' * 8' = 4*8 sq ft = 32 sq ft
Square footage of the room = 14 ft * 8 ft = 14*8 sq ft = 112 sq ft.
48
The area of a circle is pi*(radius)^2. If the 8 ft is the diameter, the area is pi*(4 ft)^2~=50.27 ft^2 (ft^2 is square feet)
6 * 8 = 48 square ft.
240 square feet
Area = 12 ft * 8 ft = 96 sq ft.
8 square feet
32
Assuming the room is 8 ft by 10 ft (the question does not say so), the area would be 8*10 = 80 square feet
Since you know the length you know the linear footage. Next: measure the width and multiply the width by the length, this will give you the area or sq. footage. Length x width. For example: a room 8 ft. long x 10 ft. wide would be 64 square feet. The length is important because your carpet at the big box store is 10 feet wide and you only need 8 linear feet. In this case the square footage is: 8 ft. x 10 ft. = 80 sq. feet.
1'4 * 8' = 11/3' * 8' = 102/3 sq ft.