TeX Quellcode:

\begin{array}{rcl} A_M & = & 2(ac+bc) \cr A_M & = & 2\cdot(3{,}5 \, cm\cdot 11 \, cm+5{,}5 \, cm\cdot 11 \, cm) \cr A_M &=& 198 \, cm^2 \end{array}