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Вариант 1(Задача 1) (К/р "Угол между прямой и плоскостью)
Author:
liudmylas
1. ABCD - ромб со стороной равной a, угол А равен 60 градусов, АМ перпендикулрен АВС, АМ = а/2. Найдите расстояние от точки М до прямой СD.
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