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Консультация № 190366
28.12.2016, 22:49
0.00 руб.
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Здравствуйте! У меня возникли сложности с таким вопросом:
1) Дан параллелограмм ABCD, три вершины которого заданы A(-1,-2,3);B(-4,1,2);C(5,2,7). Найти четвертую вершину и острый угол параллелограмма.
2) Найти длину высоты AD в треугольнике с вершинами A(3,4), B(2,-1), C(1,-7) и написать уравнение перпендикуляра, опущенного из точки C на прямую AB.
1) Дан параллелограмм ABCD, три вершины которого заданы A(-1,-2,3);B(-4,1,2);C(5,2,7). Найти четвертую вершину и острый угол параллелограмма.
2) Найти длину высоты AD в треугольнике с вершинами A(3,4), B(2,-1), C(1,-7) и написать уравнение перпендикуляра, опущенного из точки C на прямую AB.
Обсуждение
29.12.2016, 08:59
общий
это ответ
Здравствуйте, alexandr_sav!
Рассмотрим первое задание.
Вычислим координаты четвёртой вершины параллелограмма.
Вычислим координаты векторов
и 
Вычислим скалярное произведение векторов и
Вычислим модули векторов и
Вычислим величину угла между векторами и
Вычислим величину острого угла параллелограмма.
Проверьте, пожалуйста, вычисления, чтобы избежать ошибок. Если у Вас есть вопросы по предложенному решению, то задавайте их, пожалуйста, в мини-форуме консультации.
Рассмотрим первое задание.
Вычислим координаты четвёртой вершины параллелограмма.
Вычислим координаты векторов
и Вычислим скалярное произведение векторов
и Вычислим модули векторов
и Вычислим величину угла между векторами
и Вычислим величину острого угла параллелограмма.
Проверьте, пожалуйста, вычисления, чтобы избежать ошибок. Если у Вас есть вопросы по предложенному решению, то задавайте их, пожалуйста, в мини-форуме консультации.
Об авторе:
Facta loquuntur.
Facta loquuntur.
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