\[AB = 3\ см;\ \ \ \]
\[CD = 16\ см;\ \ \]
\[EF = 18\ см;\ \ \ \]
\[MK = 36\ см;\ \ \ \]
\[PS = 6\ см.\]
\[Отрезки\ пропорциональны:\]
\[\frac{\text{AB}}{\text{PS}} = \frac{\text{EF}}{\text{MK}} = \frac{1}{2}.\]
\[Ответ:\ \ AB;\ PS;\ EF;\ MK.\]