TeX Quellcode:

\begin{array}{rcl} A_M & =& \pi rs \cr A_M & =& \pi r\ \sqrt{r^2+h^2} \cr A_M & =& \pi \cdot (14 \, cm) \cdot \sqrt{(14 \, cm)^2+(31 \, cm)^2} \cr A_M & \approx& 1.496{,}04 \, cm^2 \end{array}