Решебник по геометрии 8 класс Мерзляк Задание 429

\[Рисунок\ в\ учебнике.\]

\[В\ \mathrm{\Delta}ABE:\]

\[CD \parallel AB.\]

\[\mathrm{\Delta}ABE\sim\mathrm{\Delta}CDE.\]

\[Решение.\]

\[1)\ \frac{\text{AE}}{\text{CE}} = \frac{\text{BE}}{\text{DE}};\]

\[2)\ \frac{\text{CD}}{\text{AB}} = \frac{\text{DE}}{\text{BE}};\]

\[3)\ \frac{\text{AB}}{\text{AE}} = \frac{\text{CD}}{\text{CE}}.\]