36
Step-by-step explanation:
This figure is a trapeoid.
Turning the figure sideways,
A = 1/2 (b1+b2) *h  where b1 and b2 are the top and bottom and h is the height
b1 and b2 are the  top and bottom so b1 =6 and b2=12  and h is the height so h = 4
A = 1/2 (6+12)*4
A = 1/2 (18)*4
  = 9*4
  = 36 in^2