August 2021 0 9 Report
Дано: DB — биссектриса угла ABC, BACB=DBBE. 1. По какому признаку подобны данные треугольники ΔECB∼ΔDAB?


2. Вычисли EC, если DA= 12 см, BA= 16 см, CB= 4,8 см.
(даю 35 баллов) СРОЧНО
 

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