user-avatar
lamt12661
2 năm trước
Cho (O;R) A thuộc (O;R), vẽ d tiếp xúc với (O) tại A . Trên d lấy M khác A, vẽ tiếp tuyến MB với (O;R) a. a.Chứng minh MAOB nội tiếp ( 0 cần lèm đâu) b, Gọi C là trung điểm MB, AC cắt (O) tại D, Md cắt (O) tại E biết MAD=30 độ tính cung nhỏ AD Tính S quạt AOD ứng với AD c.MC ²=CD.CA d. từ O vẽ tia Õx vuông góc OM cắt MB tại F. Xác định M trên d để S MOF đạt GTNN. tìm GTNN đó theo R câu a ko cần làm còn lại các bạn làm bao nhiêu cũng đc MOD GIÚP EM VỚi
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

giúp e vs nhaaa I. READ AND FILL IN THE BLANKS IN THE TEXT WITH ONE WORD FOR EACH BLANK.(1M) Ok Om Bok is a festival of Khmer people in Mekong Delta. Ok Om Bok Festival takes (1)...................................... on the Full Moon day of the tenth month in Vietnamese Lunar Calendar, aiming at worshiping the Moon. At the night of the Full Moon day, Khmer people set up a table of offerings; new sticky rice, yam, coconuts, bananas, sweeties, etc and bow their head to show their thanks to the Moon. After that, there is a colorful and sparkling lanterns ceremony on Ba Om Lake. Khmer people not only drop these lanterns on the lake but also (2)...................................... them to the sky. Dozens of great lantern lighten the night sky in bustling music and the joy of Khmer people. Khmer people believe that these lanterns will bring bad luck and risk far away. The (3)................................... attractive and exciting activity of Ok Om Bok Festival is Ngo race (a special kind of boat of Khmer people in shape of Nagar snake). Ngo race is a traditional sport of Khmer in Ok Om Bok Festival. Ngo is a long boat with 25 - 30 meters in length and 1 - 1.4 meter in width. There are about 40 to 60 boatmen in every “Ngo” with a leader at the top to guide the whole (4)....................................... Before the race, people gather along the riverbanks making an exciting atmosphere. During the race, the boisterous sound of drum, trumpet, cheers and applause urge boatmen row as fast as possible to the end. Overall, Ok Om Bok is an important festival in Khmer people’s life. Ok Om Bok Festival (5)............................ sacred meaning in spiritual life of these people, making a cultural characteristic of this ethnic community. II. READ THE TEXT AGAIN THEN ANSWER THE QUESTIONS. (1M) 1. When do Khmer people set up a table of offerings and bow their head to show their thanks to the Moon? .................................................................................................................................................. 2. Do Khmer people only drop these lanterns on the lake at the lanterns ceremony? ....................................................................................................................................................

I. Choose the correct answers. 1. I usually play football when I have _______. A. spare time B. good time C. no time D. times 2. In team sports, the two teams ________ against each other in order to get the better score. A. are B. do C. make D. compete 3. __________ draw on the walls and tables, please. A. Do B. Don’t C. Should D. Shouldn’t 4. Nam plays sports very often, so he looks very _________. A. sport B. sports C. sporty D. sporting 5. Last summer, I _______ fishing with my uncle in the afternoon. A. go B. went C. goes D. going 6. I like watching football matches, but I am not very good ______ playing football. A. at B. in C. on D. for 7. Team sports are sometimes called __________ sports. A. compete B. competition C. competitor D. competitive 8. “________ do you do judo?” – “Twice a week”. A. When B. Where C. How often D. Why 9. ________ sports do you like watching on TV? A. How B. What C. Do D. How often 10. Football is regarded _______ the most popular sport in the world. A. for B. as C. like D. of 11. Sports and games ________ an important part in our lives. A. play B. do C. go D. make 12. When you go to the zoo, don’t ________ the animals. A. play B. do C. tease D. watch 13. Playing sports helps us get ________. A. fat B. free C. fittest D. fitter 14. Nam’s dream is to become a _______. A. loser B. champion C. contest D. gamer 15. “I’d like to watch motor racing because it is very ________. A. frightening B. exciting C. excited D. boring 16. My sister often _______ badminton in her free time. A. play B. plays C. playing D. to play 17. Marathon is considered a/an ________ sport. A. team B. individual C. indoor D. sporting 18. Our school football team _______ the match with Tran Phu School last Sunday. A. wins B. won C. scores D. scored 19. Tam _________ three goals for our team and made it a hat trick. A. scores B. scored C. palys D. played 20. Blackburn Rover is at the bottom of the league. They _______ most of their matches this season. A. played B. won C. lost D. scored IV. Complete the short conversations. Choose the correct answer: A, B or C. 1. “I enjoy playing tennis”. A. - “I don’t like reading”. B. - “Where do you play?”. C. - “In the afternoons”. 2. “It’s sunny today”. A. - “I like camping” B. - “How much is the ticket?” C. - “Yes. Do you want to go to the beach?” 3. “I love football”. A. - “What’s your favourite team” B. - “Do you like football?” C. - “I’m watching a match”. 4. “Can you pick up the ball, please?” A. - “I play football on Tuesdays”. B. - “Yes, of course I do”. C. - “Yes, here you are”. 5. “What is the most popular sport in our country?” A. - “Yes, I play football every Sunday”. B. - “ You know I do judo twice a week”. C. - “I think football is”. Giúp mình với nha

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