user-avatar
chinh7a8
2 năm trước
Cho tam giác nội tiếp đường tròn (O) cố định. Biết B, C cố định, A di động trên (O). H là trực tâm của tam giác ABC. K đối xứng với H qua O. Dựng hình bình hành BCKL. Chứng minh rằng AL luôn đi qua một điểm cố định khi A thay đổi trên (O).
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

IV. Reflexive pronouns: By + Reflexive Pronoun = alone 1. He lives alone. He lives _______________________________________________________ 2. Nobody helps him do his chores. He ___________________________________________________________ 3. No one will help you do it. You __________________________________________________________ 4. She has to do the housework without any help. She __________________________________________________________ 5. Nobody helps her do her homework. She __________________________________________________________ V. Used to: (+): S + used to + V (bare inf.) (-): S + didn’t + use to + V (bare inf.) (?): (WH-word) did + S + use to + V (bare inf.)...? Exercise: 1. I lived on a farm once, but I don’t any more. I used_______________________________________________________ 2. I usually watched football every Sunday last year. I used ________________________________________________________ 3. There was a lake behind my parents’ house. There used ____________________________________________________ 4. I usually stayed up late to watch football matches last year. I used ________________________________________________________ 5. There were some trees in the field. There used ____________________________________________________ 6. She doesn’t live with her parents any more. She used ______________________________________________________ 7. I often played volley every Sunday morning last year. I used ________________________________________________________ 8. He is not a poor man any more.  He used ___________________________________________________ mọi người giúp em 2 bài này với em thành thật cảm ơn ạ!

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