Answer:
A = 280 ft²
Step-by-step explanation:
the figure is composed of a rectangle and a triangle.
area of rectangle = 20 × 10 = 200 ft²
area of triangle = [tex]\frac{1}{2}[/tex] bh ( b is base and h the height )
b = 20 and h = 18 - 10 = 8 , then
area = [tex]\frac{1}{2}[/tex] × 20 × 8 = 10 × 8 = 80 ft²
total area A = 200 + 80 = 280 ft²
