Предмет: Геометрия, автор: рыбача

плоскость альфа пересекает стороны AB и BC в треугольнике ABC в точке M и N,причём AM:MB=3:4 CN:BC=3:7 а0докажите что AC паралельна плоскости альфа б)найдите AC,если MN =16

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Автор ответа: ужнеужели

решение в скане.............

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