\[Схематический\ рисунок.\]
\[Дано:\]
\[\mathrm{\Delta}DEF\sim\mathrm{\Delta}MCP;\]
\[\frac{\text{DE}}{\text{MC}} = \frac{\text{DF}}{\text{MP}} = 0,3;\]
\[MC = 12\ см;\]
\[MP = 8\ см;\]
\[EF = 4,5\ см.\]
\[Найти:\]
\[CP;\ DE;\ DF.\]
\[Решение.\]
\[\frac{\text{DE}}{\text{MC}} = \frac{\text{DF}}{\text{MP}} = \frac{\text{EF}}{\text{CP}} = 0,3;\]
\[CP = \frac{\text{EF}}{0,3} = \frac{10}{3} \bullet 4,5 = 15\ см.\]
\[DE = 0,3MC = \frac{3}{10} \bullet 12 = 3,6\ см.\]
\[DF = 0,3MP = \frac{3}{10} \bullet 8 = 2,4\ см.\]
\[Ответ:\ \ CP = 15\ см;\ DE = 3,6\ см;\ \]
\[\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ DF = 2,4\ см.\]