user-avatar
thinh270906
2 năm trước
3. Tam giác ABC có BC = 18cm. Trên đường cao AH lấy các điểm I, K sao cho AK = KI = IH. Qua I và K lần lượt vẽ các đường PQ // BC, MN // BC (h.13). a) Tính độ dài các đoạn thẳng MN và PQ. b) Tính diện tích tứ giác MNQP, biết rằng diện tích của AABC là 360cm?. Ai giup cai can gap ddddddddd
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

TENSES (THÌ ĐỘNG TỪ) Choose the best answer among A, B, C, or D. 1. When I last saw him, he in London. A. has lived B. is living C. was living D. has been living 2. We _________Dorothy since last Saturday. A. don’t see B. haven’t seen C. didn’t see D. hadn’t seen 3. The train half an hour ago. A. has been leaving B. left C. has left D. had left 4. Jack __________the door. A. has just painted B. paint C. will have painted D. painting 5. My sister _ for you since yesterday. A. is looking B. was looking C. has been looking D. looked 6. I _______Texas State University now. A. am attending B. attend C. was attending D. attended 7. He has been selling motorbikes . A. ten years ago B. since ten years C. for ten years ago D. for ten years 8. He fell down when he towards the church. A. run B. runs C. was running D. had run 9. We _______there when our father died. A. still live B. lived still C. was still lived D. were still living 10. They __________table tennis when their father comes back home. A. will play B. will be playing C. play D. would play 11. By Christmas, I _ for Mr. Smith for six years. A. shall have been workin B. shall work C. have been working D. shall be working 12. I _______in the room right now. A. am being B. was being C. have been being D. am 13. I _______to New York three times this year. A. have been B. was C. were D. had been 14. I’ll come and see you before I for the States. A. leave B. will leave C. have left D. shall leave 15. The little girl asked what to her friend. A. has happened B. happened C. had happened D. would have been happened 16. John __________a book when I saw him. A. is reading B. read C. was reading D. reading 17. He said he _ return later. A. will B. would C. can D. would be 18. Jack ___________the door. A. has just opened B. open C. will have opened D. opening 19. I have been waiting for you . A. since early morning B. since 9 a.m C. for two hours D. All are correct 20. Almost everyone for home by the time we arrived. A. leave B. left C. leaves D. had left 21. By the age of 25, he two famous novels. A. wrote B. writes C. has written D. had written 22. While her husband was in the army, Mary to him twice a week. A. was reading B. wrote C. was written D. had written 23. I couldn’t cut the grass because the lawn mower a few days previously A. broke down B. has been broken C. had broken down D. breaks down 24. I have never played badminton before. This is the first time I to play. A. try B. tried C. have tried D. am trying 25. Since ________, I have heard nothing from him. A. he had left B. he left C. he has left D. he was left 26. After I lunch, I looked for my bag. A. had B. had had C. have has D. have had 27. By the end of next year, George English for two years. A. will have learned B. will learn C. has learned D. would learn 28. The man got out of the car, ______________ round to the back and opened the book. A. walking B. walked C. walks D. walk 29. Henry ___ into the restaurant when the writer was having dinner. A. was going B. went C. has gone D. did go

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