[tex]Num\check{a}rul~ diagonalelor ~unui~hexagon~ se ~calculeaz\check{a}~cu~\\\\urm\check{a}toarea~ formul\check{a}:~~\boxed{~~~
\frac{n(n-3)}{2}~~~ }\\\\
n~\rightarrow~ num\check{a}rul~ laturilor~hexagonului\\\\
n=6~laturi\\\\
Aplic\check{a}m~formula~ care~am ~scris-o~mai ~sus!!!\\\\
\boxed{ \frac{6*(6-3)}{2} = \frac{6*3}{2}= \frac{18}{2} =9}[/tex]
