Answer: 88 ft²
Explanation:
Separate the figure into two shapes:
- a rectangle with length of 9 and width of 8
- a triangle with base of 4 (13 - 9) and height of 8
Find the area of each figure
- area of rectangle is 8 · 9 = 72 ft²
- area of triangle is

The sum of the area of the two shapes is: 72 + 16 = 88