TeX Quellcode:

\begin{array}{rclcc} h^2 &=& p \cdot q & \vert & \sqrt{} \cr h &=& \sqrt{p \cdot q} \cr &\approx& \sqrt{1{,}90 \cdot 4{,}20} \cr &\approx& \sqrt{7{,}98} \cr & \approx & 2{,}82 \, cm \end{array}