The height is 4 feet
the base is 16 and the opposite side of it is 4
You need to find the area
This shape, btw is called a trapezoid
Let's call the top horizontal line, a
the base, or bottom line, b
the height is h
The equation to solve for the area of a trapezoid is
A = (a+b)* h/2
Fill in the given
A = (4 + 16) * 4/2
A = (20) * 2
A = 40
Hope this helps