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Masura unghiului unui pentagon regulat este egala cu


dau coroana


Răspuns :

 

[tex]\displaystyle\bf\\Pentagonul~are~5~laturi~si~5~varfuri.\\\\n=5\\\\Folosim~formula:\\\\masura~unghiului~unui~poligon~regulat~este:~~(n-2)\times \frac{180}{n}~grade\\\\Rezolvare:\\\\(5-2)\times \frac{180}{5}=3\times36=\boxed{\bf108^o}[/tex]