TeX Quellcode:

\begin{array}{rclcc} h^2 &=& p \cdot q & \vert & \sqrt{} \cr h &=& \sqrt{p \cdot q} \cr &=& \sqrt{\dfrac{9}{5} \cdot \dfrac{16}{5}} \cr \cr &=& \sqrt{ \dfrac{144}{25}} \cr \cr &=& \dfrac{12}{5} \, cm \end{array}