\[\boxed{\mathbf{219\ (219)}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[Развернутый\ угол = 180{^\circ}.\]
\[1)\ 4^{0} = \frac{4}{180} = \frac{1}{45}\]
\[2)\ 12^{0} = \frac{12}{180} = \frac{1}{15}\]
\[3)\ 27^{0} = \frac{27}{180} = \frac{3}{20}\]
\[4)\ 126^{0} = \frac{126}{180} = \frac{7}{10}\]
\[5)\ 153^{0} = \frac{153}{180} = \frac{51}{60}\]
\[\boxed{\mathbf{219}\mathbf{.}}\]
\[1)\ OK = 7 \cdot 3 = 21\ см;\]
\[MK = OK - OM = 21 - 7 =\]
\[= 14\ см.\]
\[2)\ OK = 7 \cdot 3 = 21\ см.\]
\[MK = OK + OM = 7 + 21 =\]
\[= 28\ см.\]