TeX Quellcode:

\begin{array}{rclcc} h^2 &=& p \cdot q & \vert & \sqrt{} \cr h &=& \sqrt{p \cdot q} \cr &=& \sqrt{3{,}1 \cdot 3{,}9} \cr &=& \sqrt{12{,}09} \cr & \approx & 3{,}48 \, cm \end{array}