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Дан куб ABCDA1B1C1D1. Построить сечение с плоскостью проходящей через точки A C D1. И найти периметр этого сечения
Ответы 1
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все ребра куба равны...диагонали граней тоже равны... сечение --треугольник))
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Автор:
dalton13 - 5 лет назад
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(to stop) near a village, where they
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