user-avatar
hoangtienduc1234
2 năm trước
Cho e hình luôn ạ Cho tam giac BFC can tai B.Ke FE vuong goc voi BC tai E,Ca vuong goc voi BF tai A. a)Chung minh tam giac BEF=tam giac BAC b)FE cat AC tai D.Chung minh BD la tia phan giac cua goc ABC. c)Goi M la trung diem cua FC.Chung minh BM vuong goc voi AE.
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Chia động từ trong ngoặc: 1. The ........ in contest programs are students, workers or family members. (contest) 2. We should not eat too much ......... food and sugar. (fat) 3. We bought plenty of ....... in Da Lat. (souvenir) 4. It is so ......... today. It is too wet and cold. I hate this kind of weather. (please) 5. We have ............ work to do in the afternoon than in the morning. (little) 6. What do ........... often do in their free time? (teen) 7. ............... students like playing basketball at recess. (energy) 8. Hurry up. We'll miss the train. Can't you run ........... (fast) -Sorry, I am going ........... I can already. (fast) -OK. I guess you are quite a bit .................. me after all. (short) 9. Before you read a book, you should turn to the list of ............ first. (contain) 10. Are there any ............. about the service of the hotel? (complain) 11. My brother is not very ............. He usually stay at home and reads books in the afternoon. (sport) 12. Their mother is a nurse. She takes care of sick ....... in the local hospital. (child) 13. I'm not .............. in this talk. (interest) 14. Thank you very much for .............. me. (invite) Oh, it's my .............. (please) 15. I have ........ work to do in the morning. (little)

Exercise 1: Choose the best answer 1. My wedding ring ………… of yellow and white gold. A. is made B. is making C. made D. maked 2. This house ……………….for 2 years. A. was built B. has been built C. has built D. built 3. References …………. in the examination room. A. not are used B. is not used C. didn’t used D. are not used 4. Mary ………….. in Boston. A. are born B. were born C. was born D. born 5. There’s somebody behind us. I think we are ………………. A. being followed B. are followed C. follow D. following 6. Have you …………….. by a dog? A. bite B. ever been bit C. ever been bitten D. bit 7. The room is being ………….. at the moment. A. was cleaned B. cleaned C. cleaning D. clean 8. Mr. Wilson is . . . . . . . . as Willie to his friend. A. knowed B. knew C. known D. is known 9. When…………..? In 1928. A. penicillin was discovered B. did pencillin discoved. C. was penicillin discovered D. did penicillin discover. 10. All the homework be doing _____________ at home. A. should do B. should done C. should be done D. should

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team