There's no way to express area in feet - it needs to be square feet. A circle of radius 12" has an area of pi sq. ft. ~= 3.141 sq. ft. A circle of diameter 12" has area pi/4 sq ft ~= 3/4 sq. ft.
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.
12 ft * 12 ft = 4 yd * 4 yd = 16 sq yards
The question does not specify the units used for the size of each brick. Assuming the brick's dimensions are given in inches, each brick covers 4" x 8" = 1/3 ft x 2/3 ft = 2/9 sq ft. Area to be covered = 320 sq ft so minimum number of bricks required = 320 / (2/9) = 1440 bricks. That answer assumes that the area to be covered is well behaved and that all offcuts are used.
To find out the area of flange the farmula is = (3.142/4)*((o.d sq.- i.d sq.)*1.1
2.67 sq yards.
32 sq. ft.
There's no way to express area in feet - it needs to be square feet. A circle of radius 12" has an area of pi sq. ft. ~= 3.141 sq. ft. A circle of diameter 12" has area pi/4 sq ft ~= 3/4 sq. ft.
4 decimals = 1742.4 sq ft.
4
441pi/4 sq ft
If the diameter of the circle is 4 feet across the area is about 12.6 sq ft. You can check this by using the formula Area=Pi times the radius squared.
155.60ft2 x 4 = 622.4ft2
10 ft 8 in * 8 ft 4 in = 88.88.. sq feet = 8.2580 sq metres
A 4 ft by 9 ft rectangle
The area of a rectangle is found by multiplying its length by its width. 6 ft x 4 ft = 24 sq ft.
Area of each triangular face = 4*sqrt(3) sq ft = 13.86 sq ft (to 2 dp) Area of each rectangular face = 40 sq ft Total area = 2*13.86 + 3*40 = 147.71 sq ft