The answer depends partly on the nature of the complex shape. Some complex shapes can be decomposed into smaller shapes whose areas can be determined using standard formulae. It is then simply a question of adding the parts together.
For more complicated shapes, there are essentially two options: you can either use uniform laminae and mass or estimate the area using grids.
Uniform Lamina: Copy the shape onto a sheet (lamina) of material with uniform density. Cut the shape out carefully and measure its mass (or weight). Do the same for a unit square of the lamina.
Then, because the lamina is of uniform density, the ratio of the two areas is the same as the ratio of the two masses.
That is: Area of Shape/Area of Unit Square = Mass of Shape/Mass of Unit Square =
Rearranging, and noting that the area of the Unit Square is, by definition, = 1 sq unit
Area of Shape = Mass of Shape/Mass of Unit Square.
Grid Method: Copy the shape onto a grid, where each grid square has an area of G square units. Count the number of squares that are fully or mostly inside the shape. Call this number W (for whole). Count the number of squares that are approximately half inside the shape and call this number H (for half). Ignore any square that are less than half in the shape.
Then a reasonable estimate of the area of the shape is G*[W + H/2] square units. There is some arbitrariness about "mostly inside" and "approximately half" but there is no way around that. You will get more accurate results with finer grids, but they will also require much more effort in terms of counting the grid squares.
You multiply the two sides the object in order to find the square feet of an area
If the side of the square is 70 feet, the area is 4900 square feet.
To find the number of square feet in 472,000,000 cubic feet, we need to know the dimensions of the area in question. If the area is a square, then you can take the square root of the volume. However, if it's a cube, you can take the cube root to find the side length and then square that to find the area in square feet.
A = 24.5 square feet.
To find the area of a square with a perimeter of 12 feet, we first need to determine the length of one side. Since a square has four equal sides, we divide the perimeter by 4 to get each side length, which is 3 feet. To find the area of the square, we square the length of one side, so the area would be 3 feet x 3 feet = 9 square feet.
300 square feet
The perimeter of a square with an area of 9 square feet is: 12 feet.
Find the area in square inches and divide by 144. (1 ft2 = 144 in2) Or, convert each side to feet by dividing by 12 (1 ft = 12 in) and then find the area which will be in square feet.
To find the area of a square, you multiply the length by the width. In this case, the area of a 100 feet by 100 feet square would be 100 feet x 100 feet = 10,000 square feet. So, there are 10,000 square feet in an area that is 100 feet by 100 feet.
If the square has an area of 256 square feet then each side of the square is 16 feet because the square root of 256 is 16
Area in square feet = pi*62
To find the square footage of a 4x8 feet area, you multiply the length by the width. So, 4 feet multiplied by 8 feet equals 32 square feet. Therefore, a 4x8 feet area has 32 square feet.