[tex]\text{Area}=\dfrac{(\text{a}+\text{b})\cdot\text{h}}{2}\\\\\text{a}=10 \ \text{ft}+6 \ \text{ft}=16 \ \text{ft}\\\\\text{b}=10 \ \text{ft}\\\\\text{h}=8 \ \text{ft}\\\\\text{Area}=\dfrac{(16+10)\cdot8}{2}=\dfrac{26\cdot8}{2}=26\cdot4=\boxed{104 \ \text{ft}^2}[/tex]
