Winkelsumme

Dreieck: $n=3n=3$:  $Winkelsumme=(3-2)\cdot {180}^{\circ }={180}^{\circ }Winkelsumme=(3-2)\backslash cdot180^\backslash circ=180^\backslash circ$

Viereck: $n=4n=4$:  $Winkelsumme=(4-2)\cdot {180}^{\circ }=2\cdot {180}^{\circ }={360}^{\circ }Winkelsumme=(4-2)\backslash cdot180^\backslash circ=2\backslash cdot180^\backslash circ=360^\backslash circ$

Fünfeck: $n=5n=5$: $Winkelsumme=(5-2)\cdot {180}^{\circ }=3\cdot {180}^{\circ }={540}^{\circ }Winkelsumme=(5-2)\backslash cdot180^\backslash circ=3\backslash cdot180^\backslash circ=540^\backslash circ$