Вопрос школьника по предмету Математика
Дано куб ABCD A1B1C1D1 знайти кут між прямими
1) AD , B B1
2) BC, A1C1
3) B1D1 , C1D
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Ответ учителя по предмету Математика
Дано куб ABCD A1B1C1D1 знайти кут між прямими
1) AD , B B1
2) BC, A1C1
3) B1D1 , C1D
Решение в приложении
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Change the meaning of the sentences to the opposite by adding the negative prefix ‘un-‘ to the words in bold type, and making other necessary changes. Translate the sentences into Russian.
1. It was very(kind) of you to come to see us off. We had so many pieces of luggage. 2. That is a rather(usual) way to begin a conversation with a stranger. 3. She was quite(prepared) for what she found on her return home. 4. In the silence of the night I heard(hurried) steps under my window. 5. It’s so (like) him to make a promise and never keep it. 6. We were told that it was(safe) to cross the river in that place. 7. When I finished speaking he made an(important) remark. 8. She is quite(able) to do without outside help. 9. I believe these changes to be(necessary). 10. He felt (well) that day and enjoyed the long country walk. 11. There was something(pleasant) in the way she spoke and laughed.
2)we had much homework yesterday