(1)$\phi +\mu =210\mathrm{°}\backslash ;\backslash ;\backslash ;\backslash varphi+\backslash mu=210°\backslash ;\backslash ;\backslash ;$(Textangabe)

(2)$\mu =2\phi \backslash ;\backslash ;\backslash ;\backslash mu=2\backslash varphi\backslash ;\backslash ;\backslash ;$(Randwinkelsatz)

(2) in (1) eingesetzt:

$3\phi =210\mathrm{°}\mathrm{\mid }:33\backslash varphi=210°\backslash ;\backslash ;|:3$

$\phi =70\mathrm{°}\backslash varphi=70°$

$\mu =140\mathrm{°}\backslash mu=140°$