Question

Question 1

Find the area of the shaded region.
18 ft
15 ft
8 ft
A = ft?

Answer 1

135 ft²

Explanation:

see attached image

shaded area = total area (1) - unshaded triangular area (2)

1. area of a trapezoid = (a + b) * h/2

where a = 8, b = 18, h = 15

Area of trapezoid = (8 + 18) * 15/2 = 195 ft²

2. Area of unshaded triangle = 1/2 (8) 15 = 60 ft²

shaded area = 195 - 60 = 135 ft²