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2 năm trước
Các bạn giúp mình với mình cần gấp!!!!! Cho điểm I là 1 điểm trong tam giác ABC thỏa điều kiện góc IBA= góc ICA. Gọi P là trung điểm của BI, H là trung điểm của CI, K là trung điểm của BC. Kẻ IE vuông góc AB, IF vuông AC a)So sánh góc EBK và góc FHK b)CM trung trực của EF đi qua K
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Bài 1: Viết lại câu sau, sử dụng từ IF: a) Type 1: 1. Recycle and we'll save natural resources. .............................. 2. Be careful or you will fall over the rocks .......................... 3. Working too much can make you feel tired. ........... 4. Don't be careless or you'll break the vase ........................................ 5. Ha can pass the exam, she has to work hard. ...................... 6. He can do a part to save the environment by buying recycled products. ......................... 7. Putting garbage into the bins is one answer to minimize pollution. ......................... 8. We should take the map with us or we will lose our way on the street. ................ 9. Ellen can borrow it, but she must give it back next week. ............................ 10. The authorities are thinking of raising the petrol prices. I will have to cycle to work. .................... b) Type 2: 1. I can't give you the answer because I don't know. ................................................................. 2. Why don't you apply for the job? ....................... 3. I advise you to pay a visit to Nha Rong Harbor. ...................... 4. But for his pension, he would starve. .............. 5. How about going to school by bus? ..................... 6. Mrs. Green has no money so he won't travel to the world. .......................... 7. Rachel might fall her driving test. But she can take it again. ..................... 8. The office might be closed. In that case Minh won't be able to walk in. ............................. 9. You haven't got a pen, so you can't write down the address. .......................... 10. The number on those houses in this apartment aren't clearly numbered, therefore I find it difficult to find my cousin's house. ................................. c) Type 3: 1. Jerry didn't understand the lesson. He didn't answer. ................... 2. Carol didn't answer the telephone because she was studying. ........................... 3. Because he didn't study hard enough, he failed in the exam. ................... 4. I was stuck in the traffic jam; and that's why I came late. ................... 5. He had the flu because he went out in the rain last night. ....................... 6. John didn't find the money. He didn't return it. ....................... 7. I didn't know you were there. I didn't call you. ............................... 8. The heavy rain prevented everybody from going out. ................... 9. Jimmy lent me the money. Otherwise, I would have gone out with business. ...................... 10. Without your help, I wouldn't have succeeded this project. ................ d) Mixed practice 1. Why don't study hard? ......................................... 2. Keep silent or you'll wake the baby up. ............................ 3. I don't know the answer, so I can't tell you. ....................... 4. We got lost because we didn't have the map. ........................ 5. My friend was so late, so he missed the train. .................. 6. This car is too heavy for me to move. ................................... 7. Morning exercises make me feel healthy. ...................... 8. The church bells keep me from sleeping. ...................... 9. Without air, we would die. ...................................... 10. I advise him to stop smoking. ................. 11. Be calm, or you'll make a wrong decision. ......................... 12. Without a visa, he couldn't have come to that new country. ................... 13. Today isn't Sunday, so the students don't go swimming. ........................... 14. Because you don't leave immediately, I call the policeman. ..................... 15. I don't know her number, so I don't ring her up. .............. 16. Go right now or you will be lte for the train. ...................... 17. As she is often absent from class, she can't keep pace with her classmates. .............................................. 18. I couldn't write to Alice because I didn't know her address. ............................................. 19. The heavy rain kept everybody from going outdoors. .................... 20. I didn't watch TV last night because I was busy. ...................... 21. People don't see the UFO, so they don't call the National UFO Reporting Center. ............................. 22. Thu can't swim, so she doesn't go swimming in Lam Son Swimming pool. ................................................. 23. His flight was delayed so he couldn't be there on time. ......................... 24. Thanks to Lisa's report, I was able to finish the project. ................... 25. Without your help, I couldn't overcome the problem. ........................

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