The calculated area of the shaded region is 81 square feet
Hwo to determine the area of the shaded region
From the question, we have the following parameters that can be used in our computation:
The figure
The area of shaded region is calculated as
Area = Area of big rectangle - Area of triangle
Using the above as a guide, we have the following:
Area = 10 * 9 - 1/2 * 6 * 3
Evaluate
Area = 81
Hence, the area of the shaded region is 81 square feet