Theo định lý :
Ta có : a // b ⇒ b //c
a vuông góc với c
Chứng minh : Đường thẳng c cắt 2 đường thẳng song song a và b , mà c vuông góc với a `⇒` c vuông góc với b (Đpcm)
`#Study well`
Ta có a vg góc vs c
a//b
=> b vg góc vs c
@Ne
Chúc bạn học tốt
Giải thích cho mình với 1......hard work is good for your health A.little B.few C.a little D.a few 2.during the day,it is ......than at night A.much hot B.more hot C.the most hot D.much hotter
Vẽ Anime linh vật các bn ơi >><< Tô full đầy đủ !!!!!! Nhờ các bn vẽ để mk lấy thêm ít động lực
1. My father waters this flower every morning. 2. John invited Fiona to his birthday party last night. 3. Her mother is preparing the dinner in the kitchen. 4. We should clean our teeth twice a day. 5. Our teachers have explained the English grammar. 6. Some drunk drivers caused the accident in this city. 7. Tom will visit his parents next month. 8. The manager didn’t phone the secretary this morning. 9. Did Mary buy this beautiful dress? 10. I won’t hang these old pictures in the living room. 11. The German didn’t build this factory during the Second World War. 12. The Greens are going to paint this house and these cars for Christmas Day. 13. Ann had fed the cats before she went to the cinema. 14. The students have discussed the pollution problems since last week. 15. Have the thieves stolen the most valuable painting in the national museum? 16. Some people will interview the new president on TV. 17. How many languages do they speak in Canada? 18. Are you going to repair those shoes? 19. He has broken his nose in a football match. 20. Have you finished the above sentences? 21. When will you do the work? 22. How are you going to deal with this problem? 23. How do you spend this amount of money? 24. I wonder whether the board of directors will choose Susan or Jane for the position. 25. How did the police find the lost man? pasive voice
I.Complete each of the following sentences with the correct form of the word from the box biology support willing mischievous obey confident care act solve responsible 1. If you continue to………………….the rules, you will be punished. 2. Spoiled children are often up to…………………. 3. The more he fails, the more he loses ........... in his abilities. 4. She is a research .......... for a pharmaceutical company. 5. She was unable, or………………….to give me further details. 6. Although he is nearly 80, he is still very…………………. 7. We are totally………………….of this idea. 8. She is a very………………….woman. She is always helpful and sympathetic toward other people. 9. He feels a strong sense of………………….towards his parents. 10. They were seeking an ultimate………………….to the city's traffic problem.
Giúp mk bài 7 vs ạ! Hứa vote 5 sao nha!
Giúp mk bài 4 vs ạ! hứa vote 5 sao nha
???????????????????????????????????????????????????????????????// Vẽ 1 cô gái anime đang chạy tóc bay (tóc ngắn thui )mang váy ko cần màu Vẽ đậu mầm Vẽ mèo cute<3
Tìm 1 lỗi sai và sửa. a) Wind is the motion that occurs when lighter air rises and cool heavier air replaces for it. b) Nylon, a synthetic done from a combination of water, air, and a by-product of coal, was first introduced in 1938. c) I’ll make some sandwiches before I’ll leave for the office in the morning.
Hãy nhạn biết các chất sau bằng pp hoá học a) Na, Al , Fe, Cứ b) NaOH , HCl , NaCl , Na2SO4
Câu :)) Oxi hoá hoàn toàn 0,728 gam bột Fe , thu được 1,016 gam hỗn hợp hai oxit sắt (A) a) Hoà tan hỗn hợp A bằng dung dịch axitnitric loãng dư. Thể tích khí NO duy nhất bay ra (đktc) là ? b) Cũng hỗn hợp A trên trộn với 5,4 gam bột Al rồi tiến hành phản ứng nhiệt nhôm ( hiệu suất 100% ) . Hoà tan hỗn hợp thu được sau pư bằng dung dịch HCl dư . Thể tích khí bay ra ở (đktc) là ? Giúp mik đi mọi người ơiiiiiiiiiiii :)) 🙏
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