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Консультация № 182571
21.03.2011, 02:19
0.00 руб.
0
1
1
Здравствуйте, уважаемые эксперты! Прошу вас ответить на следующий вопрос:
Точки А(3;-5;-8); В(7;-5;7), С(-7;7;6); D(7;6;-1) являются вершинами треугольной пирамиды.
Найдите:
а) угол между ребрами АВ и СD (укажите значение косинуса этого угла)
б) угол между гранями АВС и АВD (укажите значение косинуса этого угла)
в) длину ребра АВ
г) длину высоты, опущенной из вершины D на плоскость основания АВС
д) параметрическое уравнение этой высоты
е) общее уравнение плоскости основания АВС
ж) объем пирамиды АВСD
Точки А(3;-5;-8); В(7;-5;7), С(-7;7;6); D(7;6;-1) являются вершинами треугольной пирамиды.
Найдите:
а) угол между ребрами АВ и СD (укажите значение косинуса этого угла)
б) угол между гранями АВС и АВD (укажите значение косинуса этого угла)
в) длину ребра АВ
г) длину высоты, опущенной из вершины D на плоскость основания АВС
д) параметрическое уравнение этой высоты
е) общее уравнение плоскости основания АВС
ж) объем пирамиды АВСD
Обсуждение
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