TeX Quellcode:

\begin{array}{rcl}\alpha + \beta + \gamma &=& \dfrac{\pi}{9} +180^\circ +10^\circ \\\\\alpha + \beta + \gamma &=& \dfrac{\pi}{9} +\pi +\dfrac{\pi}{18} \\\\\alpha + \beta + \gamma &=& \dfrac{7\pi}{6} \\\\\alpha + \beta + \gamma & < & 2\pi \\\end{array}