The distance around 4,791 square feet depends on whether it is a square, a rectangle, or a really long, narrow rectangle.
Area of square = 4 x 4 = 16 sq ft; area of rectangle = 3 x 2 = 6 sq ft. Area of the square is two-and-two-thirds that of the rectangle.
It could be many different sizes. An example would be a rectangle, 30 feet by 40 feet.
In a rectangle multiply the two dimensions and get the area. 23 times 12 equals 276 square feet.
The maximum area possible using 100 feet of fencing is that inside a circular fence. But, since you asked about a rectangular fence: a 25x25 fence would hold 625 square feet. a 10x40 fence would hold 400 square feet. a 5x45 fence would hold 225 square feet. As you can see, the square is the rectangle that encompasses the largest area, as it is closest to a circle.
I assume your formula is based on interior square feet of building area. If the building is a rectangle or square, then the length in feet, multiplied by the width, in feet, gives you the total area, in square feet. If the building is square, the length and width are both the same length. Measure the lengths and widths in feet and tenths of feet, or if allowed, round off to the nearest foot. If you use inches, convert them to feet and tenths of feet, or if allowed, round off the tenths of feet to the nearest foot. If the building has more than four sides, draw lines inside the building, to divide the interior building shape into two or more rectangles. Calculate the area for each rectangle and add up the areas from each rectangle, to get the total square feet or total area of the building.
If that's supposed to be a rectangle, then multiply length x width. That will give you the area, in this case in square feet.
It is 40,000 square feet.
280 square feet.
220 square feet
1,205.56 square feet.
10,763.9 square feet.