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в тетраэдре DABC Точки А1 В1 и С1-середины ребер DA,DB и DC соответственно
Докажите подобие треугольников ABC и А1В1С1
Найдите площадь А1В1С1,если площадь ABC=44см^2
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решение в скане..................
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Автор:
olivecase - 5 лет назад
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