A. 8.53 units is the length of the straight which is perpendicular to the straight line CD
True because u could divide the number of cubes on the top, front, and left to get how many are in the structure
Area of the wall = 8 x 19 = 152 ft square
Area of the window = 4 x 5 = 20 ft square
Area of 3 windows = 20 x 3 = 60 ft square
The percent area of 3 windows from area of the wall = 60/152 or approximately .395 or 39.5%