\[\boxed{\text{7.76.}}\]
\[\angle KOL = 130{^\circ}\]
\[\angle LOM = 50{^\circ}\]
\[\angle MON = 130{^\circ}\]
\[\angle NOK = 50{^\circ}\]
\[\angle KOL = \angle MON;\ \ \]
\[\angle LOM = \angle NOK.\]
\[Равна\ 180{^\circ}\ сумма\ углов:\]
\[1)\ KOL\ и\ LOM;\]
\[2)\ MON\ и\ NOK;\]
\[3)\ KOL\ и\ NOK;\]
\[4)\ MON\ и\ \text{LOM.}\]