Answer:
Given that,
Rectangle is removed from a right triangle to create the shaded region
To find the area of the shaded region.
Area of the shaded region is
![=\text{Area of the right triangle}-\text{Area of the rectangle}](https://img.qammunity.org/2023/formulas/mathematics/college/uxk232maxaxvthwaofvsjj319vhoat43ns.png)
Base of the right triangle is 8 ft
Height of the right triangle is 9 ft
Area of the right triangle is,
![\begin{gathered} =(1)/(2)* base* height \\ =(1)/(2)*8*9=36ft^2 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/wqznr5lq3cvmn069kcjpejo7mfmetykzz6.png)
Area of the rectangle is,
![=\text{length}* height](https://img.qammunity.org/2023/formulas/mathematics/college/ui5qeowvvt8tqlehhi7od48tjnlmcy75c2.png)
![=4*1=4ft^2](https://img.qammunity.org/2023/formulas/mathematics/college/48aof7o0z3gkq49enzcixduihdurf745iz.png)
Area of the shaded region is,
![\begin{gathered} =(36-4)ft^2 \\ =32ft^2 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/sgl1k691huipm6hb9hklrvdc1960k20u6w.png)
Area of the shaded region is 32 ft^2.