It's a parallelogram and a triangle.
The formula of an area of a It's a parallelogram:

b - base, h - height
We have: b = 8 ft and h = 5ft. Substitute:

The formula of an area of a tringle:

b - base, h - height
We have: b = 10 ft and h = 5 ft. Substitute:

The area of the figure:
