К плоскости квадрата АВСД проведен перпендикуляр ОК, О – точка пересечения диагоналей квадрата. Вычислите угол между плоскостью квадрата и прямыми КА, КВ, КС и КД, если АВ=8см, КО=4√2см
Разберем, как построить сечение пирамиды, на конкретных примерах. Поскольку в пирамиде нет параллельных плоскостей, построение линии пересечения (следа) секущей плоскости с плоскостью грани чаще всего предполагает проведение прямой через две точки, лежащие в плоскости этой грани.
В простейших задачах требуется построить сечение пирамиды плоскостью, проходящей через данные точки, уже лежащие в одной грани.
Пример.
сечение пирамиды
Построить сечение плоскостью (MNP)
Построить сечение пирамиды плоскостью, проходящей через точки M, N, P.
My country house has two floors. On the first floor we have two rooms and a kitchen. On the first floor we have three rooms: a living room and two bedrooms.
In the dining room on the ground floor we have a large round table with several chairs around it and two sideboards. In the guest room on the ground floor we have four armchairs, a sofa, a fireplace and a large TV. The kitchen has a stove, sink, microwave and frige. We have a computer and a bookcase, a small table and a sofa in the living room. We have beds in the bedrooms. My country house is special to me because it is very comfortable. It is beautifully decoratedMy country house has two floors. On the first floor we have two rooms and a kitchen. On the first floor we have three rooms: a living room and two bedrooms.
In the dining room on the ground floor we have a large round table with several chairs around it and two sideboards. In the guest room on the ground floor we have four armchairs, a sofa, a fireplace and a large TV. The kitchen has a stove, sink, microwave and frige. We have a computer and a bookcase, a small table and a sofa in the living room. We have beds in the bedrooms. My country house is special to me because it is very comfortable. It is beautifully decorated
Разберем, как построить сечение пирамиды, на конкретных примерах. Поскольку в пирамиде нет параллельных плоскостей, построение линии пересечения (следа) секущей плоскости с плоскостью грани чаще всего предполагает проведение прямой через две точки, лежащие в плоскости этой грани.
В простейших задачах требуется построить сечение пирамиды плоскостью, проходящей через данные точки, уже лежащие в одной грани.
Пример.
сечение пирамиды
Построить сечение плоскостью (MNP)
Построить сечение пирамиды плоскостью, проходящей через точки M, N, P.
In the dining room on the ground floor we have a large round table with several chairs around it and two sideboards. In the guest room on the ground floor we have four armchairs, a sofa, a fireplace and a large TV. The kitchen has a stove, sink, microwave and frige. We have a computer and a bookcase, a small table and a sofa in the living room. We have beds in the bedrooms. My country house is special to me because it is very comfortable. It is beautifully decoratedMy country house has two floors. On the first floor we have two rooms and a kitchen. On the first floor we have three rooms: a living room and two bedrooms.
In the dining room on the ground floor we have a large round table with several chairs around it and two sideboards. In the guest room on the ground floor we have four armchairs, a sofa, a fireplace and a large TV. The kitchen has a stove, sink, microwave and frige. We have a computer and a bookcase, a small table and a sofa in the living room. We have beds in the bedrooms. My country house is special to me because it is very comfortable. It is beautifully decorated