user-avatar
ngohoangduong09
2 năm trước
1,Cho hình thang ABCD có đáy lớn CD hai đường chéo AC và BD cắt nhau tại O các đường thẳng kẻ từ a và b lần lượt song song với BC và AD cắt đường chéo BD và AC lần lượt ở F và E a, c/m AB//EF b, c/m AB^2=CD.EF 2, Cho hình bình hành ABCD một đường thẳng d đi qua A cắt đường chéo BD tại P cắt các đường thẳng BC và CD lần lượt tại M và N a, c/m BM.DN không đối b, c/m 1/AM + 1/AN= 1/AP ( Các bạn vẽ hình và giải chi tiết giúp mink nha mình cảm ơn)
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Question I: Choose the best answer to fill in each blank. 1. Please ............... the milk carefully. I don’t want it to boil over. A. see B. watch C. look at D. notice 2. “Was he disappointed?” - “Yes, he found the movie ........................” A. boring B. boringly C. bores D. bored 3. ........................ 20 September, 1529, five small ships set sail from Spain. A. At B. In C. On D. By 4. Every student in those five rooms must bring ......................... own books to class. A. one’s B. someone’s C. their D. his 5. “Was the competition a success?” - “Yes, ...................... people took part in it than usual.” A. more B. fewer C. less D. many 6. What do students often do ...................... break? A. in B. for C. at D. on 7. I don’t like brown rice. Don’t you have ................................? A. white ones B. any white C. no white D. a white 8. Would you like .......................... that for you? A. me doing B. that I do C. me do D. me to do 9. You can join the club when you ........................... older. A. will get B. get C. are getting D. can get 10. Can you see any people in the house? ................................. A. Only a little B. Only few C. Only a few D. Only little

II. Put the verbs into the correct tense or form. 1. I wish I (live) ………………………..in Paris. 2. My sister wishes she (have) ……………………….a new bike. 3. the pikes wish they (buy) ……………………….that buiding. 4. Mary wishes there (be) ………………………..lakes near her house. 5. I wish it (not rain) ………………………….a lot in the winter. 6. We wish we (understand) ……………………………..what they are saying. 7. they wish they (visit) …………………………Ho Tay water Park someday. 8. I wish I (can) ………………………..swim. 9. I wish I (know) ………………………. her phone. 10. I wish he (not hit) …………………………….me. III.Give the correct forns of the verbs. 1. Cullen used to (live) ………………………… in a castle in California. 2. His grandmother didn’t you (have)…………….three pet elephants. 3. I am used to (stay) …………………………..up late. 4. She used (walk) ……………………………to school. 5. She didn’t use to (have) …………………………….long hair. 6. Did you use (wear) ………………………….Jeans to school. 7. Mary used to (live) …………………………in London. 8. There used (be) …………………………..an airpot near my house. 9. She get used to (get) ……………………………up early. 10. I am used (learn) ……………………….in the evenings.

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