Find the area of the shaded region. (Blue is the shaded region)

Answer:
135ft^2
Step-by-step explanation:
area of trapzoid= (a+b)/(2)×h
area of traingle= 1/2(b)(h)
area of the shaded region equals (a+b)/(2)×h-1/2(b)(h)
so
(8+18)/(2)×15-(1/2)(8)(15)
=135ft^2