Incorrect. Find the area of the triangle and the area of the semicircle separately. The formula for the area of a triangle is $\displaystyle{A}=\frac{{1}}{{2}}{b}\cdot{h}\usepackage{cmbright}\Huge\$ . The formula for the area of a semicircle is $\displaystyle{A}=\frac{{\pi{{r}}^{{2}}}}{{2}}\usepackage{cmbright}\Huge\$ . The radius is $\displaystyle{r}=\frac{{10}}{{2}}={5}\usepackage{cmbright}\Huge\$ . Add the areas of the shapes to find the entire area of the composite figure.