TeX Quellcode:

\begin{array}{rclcc}b^2 &=& q^2+h^2 &\vert &\sqrt{}\\b &=& \sqrt{q^2+h^2}\\&\approx& \sqrt{0{,}5^2+0{,}39^2}\\&\approx & 0{,}63\, cm\end{array}