\[\boxed{\mathbf{1081.ОК\ ГДЗ - домашка\ на}\ 5}\]
\[Углы\ правильного\ \]
\[n - угольника\ находятся\ по\ \]
\[формуле:\ \]
\[\alpha = \frac{n - 2}{n} \bullet 180{^\circ}.\]
\[\textbf{а)}\ n = 3:\ \ \ \]
\[\alpha = \frac{3 - 2}{3} \bullet 180{^\circ} = 60{^\circ};\]
\[\textbf{б)}\ n = 5:\ \ \ \]
\[\alpha = \frac{5 - 2}{5} \bullet 180{^\circ} = 108{^\circ};\]
\[\textbf{в)}\ n = 6:\ \ \ \]
\[\alpha = \frac{6 - 2}{6} \bullet 180{^\circ} = 120{^\circ};\]
\[\textbf{г)}\ n = 10:\ \ \ \]
\[\alpha = \frac{10 - 2}{10} \bullet 180{^\circ} = 144{^\circ};\]
\[\textbf{д)}\ n = 18:\ \ \ \]
\[\alpha = \frac{18 - 2}{18} \bullet 180{^\circ} = 160{^\circ}.\]