Respuesta :

Given:

[tex]\angle SMO=45^{\circ}[/tex][tex]\begin{gathered} \angle SMO+\angle SMN=180^{\circ} \\ 45^{\circ}+\angle SMN=180^{\circ} \\ \angle SMN=180^{\circ}-45^{\circ} \\ \angle SMN=135^{\circ} \end{gathered}[/tex]