user-avatar
Bbh1221
2 năm trước
Cho tứ giác ABCD có góc 𝐵𝐶𝐷 ̂ < 𝐴𝐷𝐶 ̂ < 90𝑜 và AD = BC. Gọi M, N là trung điểm của AB và CD. Gọi E là giao điểm của AD và BC. 1) Gọi P, Q là trung điểm của AC và BD. Chứng minh tam giác MPQ cân. 2) Chứng minh rằng MN song song với đường phân giác của góc 𝐶𝐸𝐷
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

9.He made such an unreasonable excuse. No one showed sympathy with him. ……………………………………………………………………………………..…………… 10.This issue is very important. We should not ignore it. ……………………………………………………………………………………..…………… III. Fill in the blanks with so MUCH or so MANY. 1. We have __________________mathematical problems that we can’t go to bed early. 2. There was_________________ audience that no seats in the hall were left. 3. The new job is taking me_________________time that I am considering to resign. 4. Doctor Simmon has_________________ patients that he’s always busy. 5. I ate__________________ sandwiches that I felt ill. 6. My father has_________________work to do that he can’t come back home tonight. 7. They drank__________________ wine that they couldn’t walk. 8. His mother asks him to take ________________hings that he can’t put all of them into his suitcase. 9. There are _________________places of interest in London that Jane can’t decide where to go first. 10. There was_____________________ noise in the room that I couldn’t work. 11. There are__________________ planets in the universe that we can’t count them. 12. She had___________________ problems that she didn’t know what to do. 13. He has_________________ contact with friends through email that it takes him more than one hour to check mail every dav. 14. Smoking cigarettes causes________________danger that smokers suffer a lot of serious diseases. 15. Since they moved to the new town, their routines have got_________________changes that their lives have been turned upside down.

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