Предмет: Математика, автор: koftiknastya

Построить сечение параллелепипеда ABCDA B C D1 плоскостью, проходящей через точки: М, лежащую на ребре C1D1 ; В1; N, лежащую на ребре AD.​

Ответы

Автор ответа: NNNLLL54
0

Ответ:

АВСDA₁B₁C₁D₁  - прямоугольный параллелепипед .

М ∈ C₁D₁  ,  N ∈ AD .  Провести сечение через точки M , N , B₁ .

B₁M ∩ A₁D₁ = F

FN ∩ A₁A₁ = E  ,  FN ∩ DD₁ = K

Точку E соединяем с точкой В₁  .

В₁E ∩ AB = P

MKNPВ₁ - искомое сечение .

Приложения:
Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Биология, автор: nastya458268
Гриби що викликають захворювання у ЛЮДИНИ (для презентації)​
1 год назад
Предмет: Английский язык, автор: sgulnazzz
a Complete the conversations with the correct form of the verbs in brackets. Use contractions where possible. 1 A Is Laura still frightened of flying? B Yes, she hasn't been ten years. 2 A Do you like snakes? B No, I was a child. 3 A How long B We've been here since 2005. university. (no: be) on a plane for about 5 A How's John these days? I don't know, I B (have) a phobia of them since I 4 A Does your sister work at the local school? B Yes, she 6 A Is that a new coat? B No, I (you / live) in Prague? (work) there since she left since he moved to Washington. (not hear) from him (have) it for years.​ срочноооооо!
1 год назад
Предмет: Химия, автор: gigatron
Допоможіть мені будь ласка!
1 год назад
Предмет: Английский язык, автор: timofa902
1. Read the text and choose the right item in the sentences after it. This strange bird is New Zealand's national symbol. Everywhere in the world, Kiwi is New Zealand, or a New Zealander. New Zealanders also like to call themselves Kiwis. The Kiwi (bird) got its name after its cry call - "kee-wee kee-wee". It can't see well, and although it has wings, it cannot fly. Kiwis live in forests or wet places and feed on insects, worms, snails, and berries. It is unusual in at least two things. First, it is the only bird in the world that has its nostrils1 at the end of its long beak to find food and sense danger. Second, the female kiwi has the largest egg, in proportion to its body size. Kiwis are as big as chickens, but their eggs are almost as big as those of ostriches! There are several species of kiwi spread over the North and South Islands of New Zealand. The kiwi looks very much like kiwifruit - the brown furry fruit with the green flesh. Kiwifruit comes originally from China, and in fact its original name was Chinese gooseberry2. Sometime in the 1960s, the kiwifruit farmers in New Zealand decided to market the fruit overseas, but decided to give them another name. To help identify the fruit with New Zealand, they chose the name kiwifruit. Some people call kiwifruit kiwis, but this is incorrect. New Zealanders especially find this very wrong! A kiwi is a bird or a human New Zealander; but the fruit has different names - kiwifruit or Chinese gooseberry. While it's not easy to see the real kiwi bird, the kiwi as a symbol is everywhere: on stamps and coins, on all sorts of products, in the toy shops, on flags, everywhere, all over the world. 1) People think that the kiwi bird is strange because it ... . a) has a long tail b) has too long wings c) can't fly 2) The name of the bird comes from ... . a) its size b) its cry c) New Zealand fruit 3) Kiwis are really unusual because they ... . a) look like ostriches b) are as big as ostriches c) lay eggs as big as those of ostriches 4) New Zealanders call themselves ... . a) kiwifruit b) gooseberries c) kiwis 5) The kiwifruit originates from ... . a) China b) Australia c) New Zealand ответ на задание
7 лет назад
Предмет: Математика, автор: keborg228
Квадрат и прямоугольник – равновеликие фигуры. Чему равна сторона квадрата, если длина прямоугольника 24 см, а его ширина 6 см.
7 лет назад