\[\mathbf{Страница\ 42.}\]
\[\boxed{\mathbf{1.}}\]
\[\textbf{а)}\]
\[Ответ:\]
\[KL;LM;MN;NE;EK;KM;KN;\]
\[LN;LE;ME.\]
\[\textbf{б)}\ \]
\[Ответ:BC;BD;AB;AC;AD;CD.\]
\[\boxed{\mathbf{2.}}\]
\[MN;MC;MO;NC;NO;CO -\]
\[всего\ 6\ отрезков.\]
\[SP;SC;SD;SO;PC;PD;PO;CD;\]
\[CO;DO - 10\ отрезков.\]
\[\boxed{\mathbf{3.}}\]
\[\textbf{а)}\ \text{EM}\]
\[\textbf{б)}\ CB\]
\[\textbf{в)}\ CA\ \]
\[\boxed{\mathbf{4.}}\]
\[Проведите\ отрезки:\]
\[DB;DC;AC;BE;AE.\]