wow hard one how would I answer this one!so far yall have done a amazing job :)

ok
[tex]\begin{gathered} \text{Area = }\frac{base\text{ x height}}{2} \\ \text{Area = }\frac{9.8\text{ x 5.9}}{2} \\ \text{Area = }\frac{57.82}{2} \\ \text{Area = 28.91 cm}^2 \end{gathered}[/tex]