Respuesta :

[tex]\text{area of semi circle }=\frac{1}{2}\pi r^2[/tex]

r = 12 units

[tex]\begin{gathered} \text{area}=\frac{1}{2}\times3.14\times12^2 \\ \text{area}=\frac{1}{2}\times3.14\times144 \\ \text{area}=\frac{452.16}{2}=226.08 \\ \text{area}=226.1 \end{gathered}[/tex]