Area is measured in sq feets
To find area shaded is
Rectangle Area - Triangle area
Rectangle area is b • h= base • height = 7x8 = 56 ft^2
Triangle area is (b•h)/2 = (7-5)•(8-4)/2 = (2•4)/2 = 4 ft^2
Shaded area = Rectangle - triangle
. (56 - 4) ft^2= 52 ft^2