Cho tam giác ABC, trung tuyến AD, biết AB = 4cm; AC = 8cm. Qua B dựng đường thẳng cắt AC tại F sao cho góc ABF bằng góc ACB. a) Chứng tỏ tam giác ABF và tam giác ACB đồng dạng. Tính độ dài đoạn CF b) Chứng tỏ diện tích tam giác ABC bằng hai lần diện tích tam giác ADC c) Gọi O là giao điểm của BF và AD, CO cắt AB tại E. Từ A và C lần lượt dựng các đường thẳng song song với BF cắt CO tại J và cắt AD tại I. + Chứng tỏ FC/FA = CI/JA + Chứng tỏ DB/DC . FC/FA . EA/EB = 1.

Quan niệm mới mẻ tiến bộ của Xuân Diệu trong bài thơ Vội vàng

viết lại các câu sử dụng cho my mother went to the airport by taxi.TOOk

làm hộ mk nha mn mk đang cần gấp

Cảm giác về bức tranh mùa hè sống động, không tĩnh tại được gợi lên từ những từ ngữ nào sau đây ? A. đang chín B. gọi bầy C. lộn nhào D. ngọt dần *Chú ý: chọn từ 2 đáp án trở lên*

Highlight A, B, c or D to indicate words that are different from the other three words in Position of main stress in each of the following questions. 3. A. punishment B. unique C. burden D. leisure 4. A. owns B. handicrafts C. toxic D. perceived Highlight A, B, c or D to indicate the underlined part to be edited in Each of the following questions 5. United Kingdom includes United Kingdom and Northern Ireland. A B C D 6. Thanks to nutritionists, we know that diet affects our health. A B C D 7. I asked David where he would go on vacation next summer. A B C D Highlight A, B, c or D to indicate the correct answer for each of the following question 8. Tourism contributed ____ this month Country revenue data. A. on B. to C. at D. in 9. If we do not take steps to wildlife world, many birds and animals have the ability to completely die. A. protect B. keep C. protect D. protect 10. Mona Lisa, _________ is a picture of Leonardo da Vinci, has caused a lot discuss. A. which B. who C. that D. what 11. If you are unsure of the meaning of a word, write it down in the dictionary. A. consult B. receive C. hold D. look 12. Another positive aspect of tourism is that it helps ________i internationally understanding and cooperation. A. Motivation B. Motivation C. Motivation D. Motivation 13. Tourism plays an important part in the development of many countries. (SYNONYM) A. title B. factor C. topic D. industry Highlight A, B, c or D to indicate the best answer to complete each letter The following exchange 14. - Do you feel like going to the stadium this afternoon? - A. I disagree. I'm scared. B. I feel very bored. C. You have welcomed. D. That would be great. 15.- I cannot do this. - A. Oh, come on! Have a go! B. Yes. It is not easy. C. No, I hope not. D. Certainly, there is no way! Read the following paragraph and highlight the letters A, B, c or D to indicate Correct answers to each question New York has Central Park; London has Hyde park while Kuala Lumpur has its own Green belt piece amidst the hustle and bustle of city life. It is an ideal place for one leisurely stroll in a tranquil setting, all without having to leave the city. Lake Gardens was created by Sir Alfred Venning, who convinced the ruling government allowed him to turn a swampy land into trails dotted with artificial, stretching lakes 60 ha. However, as the city expanded, Lake Gardens decreased in size. But it remains a large area and boasts not only grass and water on its campus. For example, the gardens combine National Monument, Bird Park, Hibiscus Gardens as well as Malaysia Malaysia Parliament House. In addition, Carcosa Seri Negara is on a hilltop overlooking the Lake Garden. Today, the 19th century British Colonial villas have been converted into an exclusive hotel. 16. According to the passage, New York, London and Kuala Lumpur have nothing general? A. They used to have a lake in the city. B. They used to have a swampy land in the city. C. They used to have a park in the middle of the city. D. Everyone has a 60-hectare garden in the city. 17. In Lake Gardens, you can visit the following spaces EXCEPT _______. A. Hyde Park B. Bird Park C. Hibiscus Garden D. National Monument 18. Over time, Lake Gardens became smaller because ____. A. that is swamp B. developed city C. it's too noisy D. it's getting too crowded 19. Carcosa Seri Negara is currently a_____. A. park B. hotel C. villa D. museum 20. The word severe numeric conversion in the last last sentence means ____. A. build B. consume C. carry out D. change

Cảm nhận của em về khổ thơ thứ 2 của bài thơ nhớ rừng. Các bạn có viết đc bài nào hay cho mình tham khảo với.Thank.Mà đừng sao chép mạng gì nhek

tính C=(1-1/3)*(1-1/6)*(1-1/10)*(1-1/15)*.....(1-1/210)

Cho ham so y=-x2 nghich bien khi x>0 dung hay sai via sao?

Trình bày cuộc kháng chiến chống Pháp từ 1858-1873 ? ( ko chép mang ok )