To find the area of the rectangle ABCD, we can use the formula for the area of a rectangle: Area = length x width.
To find the length of the rectangle, we can calculate the difference between the x-coordinates of points A and B:
Length = 3 - (-5) = 3 + 5 = 8 units.
To find the width of the rectangle, we can calculate the difference between the y-coordinates of points A and D:
Width = 8 - 4 = 4 units.
Now we can calculate the area of the rectangle:
Area = 8 units x 4 units = 32 square units.
Therefore, the area of rectangle ABCD is 32 square units.