Answer:
13.5 ft²
Step-by-step explanation:
This is also a trapezoid so we can do this formula:
[tex]A=\frac{a+b}{2} *h\\\\A=\frac{3+6}{2} *3\\\\A=\frac{9}{2} *3\\\\A=4.5*3\\A=13.5[/tex]
