user-avatar
quocanh1909
2 năm trước
Cho ∆ABC vuông tại A có góc B bằng 60° và AB=5cm. Tia phân giác của góc B cắt AC tại D. Kẻ DE vuông góc với BC tại E a) Chứng minh : ∆ABD = ∆EBD b) Chứng minh : ∆ABE là tam giác đều c) Tính độ dài cạnh BC
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

11. At first I thought Jake was an interesting/ interested guy, but tonight I felt somewhat boring/ bored with his company. 12. I think all my teachers are (amazed/ amazing). I love them very much. 13. It was very (disappointing/ disappointed) not to get the job. 14. Philip was (annoying/ annoyed) at Joanne's behaviour. 15. I thought the program on wildlife was (fascinating/ fascinated). I was (fascinating/ fascinated). 16. We were (thrilling/ thrilled) to hear your good news. 17. The journey took all day and night. They felt (tiring/ tired). 18. Did Tim feel frightening/ frightened when he saw the snake? 19. Last week, my father threw a (surprised/ surprising) party to celebrate my birthday. 20. I didn’t find the jokes at all (amused/ amusing). II. Complete the sentences with present participle or past participle form of the verb in brackets. 1. The film wasn't as good as we had expected. (disappoint) a. The film was _________________________ . b. We were ________________________ with the film. 2. Diana teaches young children. It's a very hard job but she enjoys it. (exhaust) a. She enjoys her job but it is often ______________________ . b. At the end of a day's work, she is often _______________________ . 3. It's been raining all day. I hate this weather. (depress) a. This weather is _____________________ . b. This weather makes me ______________________ . c. It's silly to get ____________________ because of the weather. 4. Clare is going to the United States next month. She has never been there before. (excite) a. It will be an ________________ experience for her. b. Going to new places is always ________________ . c. She is really __________________ about going to the United States. 5. move a. The film was so ________________. b. I was deeply ________________ by the film. 6. tire a. Going shopping all day makes me feel __________________. b. Going shopping all day is ______________________. 7. terrify a. Both of us were __________________ of that violent scene. b. That violent scene was _______________________. 8. interest a. Jim’s ___________________ in reading books. b. Jim finds reading books ____________________. 9. fascinate a. Jane sometimes has many _____________ ideas. (thu vi, hai long) b. We are _____________________ by Jane’s ideas. 10. depress​ a. The weather was ___________________ yesterday. b. The weather made me feel _______________________ yesterday. II. Hoàn thành câu thứ hai sao cho nghĩa không thay đổi so với câu thứ nhất, sử dụng từ gợi ý trong ngoặc. 1.​There was a traffic jam. I arrived at the train station on time. (although) ____________________________________________________________________ 2.​I don’t want to buy a new computer. I have enough money. (although) ____________________________________________________________________ 3.​Both of them usually go to school late. They don’t live far away from school. (in spite of) ____________________________________________________________________ 4.​My brother still went to school yesterday. He had a sickness. (despite) ____________________________________________________________________ 5.​He looks healthy. He has a weak heart. (although) ____________________________________________________________________ 6.​Louis is not so rich. He often does charity. (although) ____________________________________________________________________ 7.​The weather was awful. We enjoyed our party last night. (despite) ____________________________________________________________________ 8.​She goes shopping every week. She has many clothes. (in spite of) ____________________________________________________________________ BT: Sử dụng liên từ “however” hoặc “nevertheless” để liên kết hai câu cho sẵn. 1. Mrs. Smith loves her children so much. She’s sometimes very strict. __________________________________________________________________ 2. We can go there by bus. It is not the only way. ___________________________________________________________________ 3. Jim is good at English. He is not the best student. ___________________________________________________________________ 4. My new phone costs a lot of money to buy. It isn’t as good as I expected. ___________________________________________________________________ 5. It’s hard to find a parking lot near here on Sunday. I think we can find one. ___________________________________________________________________ 6. My mother wants to go to Paris in this summer. My dad wants to go to Berlin. ___________________________________________________________________ 7. Jane doesn’t like salads. She likes vegetables. ___________________________________________________________________ 8. My father loves watching football match. He never plays football. ___________________________________________________________________

A) 1. If he (work) more, he would finish in time. 2. They would do well on the test if they (study) more. 3. If I (be) you, I would run for president! 4. Mary (buy) a new jacket if she had enough money. 5. If Jason flew to New York, he (visit) the Empire State Building. 6. We (take) a break, if our boss weren't so nervous today. 7. If Sally (go), she wouldn't return! 8. Alan wouldn't know if you (ask) him. 9. Jennifer (refer) you for the position if she thought you were qualified. 10. Alison wouldn't help them if they (not ask) for help. B) 1. If she knows the time, she _____ (come) to the meeting. 2. She _____ (attend) the meeting if she had the time. 3. Peter _____ (say) yes if you ask him. 4. Unless he _____ (finish) soon, we won't be able to come. 5. If he _____ (be) president, he would invest more in education. 6. What _____ (you do) if you were president? 7. She _____ (fly) Northwest Airlines if she has a choice. 8. If I _____ (think) I could do it, I would do it! 9. Alan would invite Mary if it _____ (be) his party. 10. She won't marry Peter if he _____ (ask) her. C) Finish or complete the sentences. 1. If you changed your job ................ 2. If we bought a house in the country ...................... 3. What ......................... if he proposed to you ? 4. What would happen if ......................................... 5. How would he react if ......................................... 6. If you helped me ................................................... 7. Even if he were rich and handsome ................................

1. Nhận xét của em về người vượt thác? Những chi tiết nào thể hiện điều đó? 2. Qua nhân vật DHT vượt thác em hình dung khúc sông đó như thế nào? 3. Hoàn thành sau: Ví dụ b (sgk, tr45) - Văn bản tả cảnh …………………………………………. - Tác giả đã lựa chọn cảnh ………………………….. để tả - Cảnh vật được miêu tả theo thứ tự ………………………. Ví dụ c (sgk, tr45 + 46) - Văn bản tả cảnh …………………………………………. - Văn bản có 3 phần tương đối trọn vẹn: + Mở bài: …………………………………………………… + Thân bài: ………………………………………………….. + Kết bài: …………………………………………………… è Thứ tự miêu tả: ………………………………………… 4. Hiện nay dịch Covid đang diễn biến khá phức tạp. Toàn xã hội hiện đang thực hiện cách ly xã hội theo yêu cầu của Thủ tướng Chính phủ. Không được ra ngoài để ngắm phố phường nhưng em vẫn có thể ngắm nhìn không khí và cảnh vật xung quanh qua ô cửa sổ hoặc cửa chính của gia đình em. Em hãy viết một bài văn miêu tả lại khung cảnh em nhìn thấy qua ô cửa nhà em. (Lớp 6A3). (Các bạn suy nghĩ và viết bài để lúc đi học cô giáo thu và chấm lấy điểm Hệ số 2) 5. Em hãy tả lại quang cảnh một giờ học mà em ấn tượng nhất. (Lớp 6A7) (Các bạn suy nghĩ và viết bài để lúc đi học cô giáo thu và chấm lấy điểm Hệ số 2)

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