$\beta \backslash beta$ ist Nebenwinkel zu $\alpha \backslash alpha$.

Damit gilt: $\alpha +\beta =180^{\circ }\backslash alpha+\backslash beta=180^\backslash circ$.

Folglich: $\beta =180^{\circ }-110^{\circ }=70^{\circ }\backslash beta=180^\backslash circ-110^\backslash circ=70^\backslash circ$.

$\gamma \backslash gamma$ ist Scheitelwinkel zu $\alpha \backslash alpha$. Damit gilt: $\gamma =\alpha =110^{\circ }\backslash gamma=\backslash alpha=110^\backslash circ$.