\[\boxed{\ \mathbf{91\ (91)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[Отрезки:MN.\ \]
\[Лучи:\ \ MA;\ \ MB;\ \ NA;\ \ NB;\ \ MN;\ \ \]
\(\text{NM.}\)
\[Прямые:\ AB;\ \ AM;\ \ AN;\ \ MA;\ \ \]
\[MN;\ \ MB;\ \ NA;\ \ NM;\ \ \]
\[NB;\ \ BN;\ \ BM;\ \ BA.\ \]