user-avatar
cuong300902
2 năm trước
Cho tam giác ABC vuông tại A, AC>AB. Trung trực của AB cắt BC tại I a) chứng minh AIB và AIC là tam giác cân b) Từ I kẻ đường thắng d vuông góc với BC, cắt tia BA và AC tại M và N; tia BN cắt CM tại E. Chứng minh EB vuông góc MC c) Chứng minh: EA // BC d) Tìm điều kiện của tam giác ABC để N là trọng tâm của tam giác AIE Các cao nhân giúp em vs ạ! :3
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

ai nhanh nhất mình cho 5 sao và cho hay nhất ài 4: Mỗi câu sau c lỗi sai, em hãy t m và sửa lỗi sai đ : 29. Did he invited you to his birthday party? __________________ 30. They will build sandcastles in the beach. __________________ 31. How did you get there? – I went on underground. __________________ 32. We took a lot of photo at the party. __________________ 33. She often go swimming with her friends at the weekend. __________________ 34. I always have big breakfast before I go to school. __________________ 35. She lives in her grandparents in a small village. __________________ Vi Phượng | English 5 24 ài : . Đọc đoạn v n, điền từ c n thiếu: homework floor will Province times visited with three Primary in My name is Giang. I’m in Class 5B, Dong Da (36) ___________ School. I live with my parents and my sister in Nam Dinh (37) _____________. My address is Flat 11, the third (38) ________ of Nam Dinh Tower. My city is big, crowded but pretty. I go to school from Monday morning to Friday morning. In the afternoon, I usually do my (39) ___________________. Sometimes, I go to the library (40) _______ my friends. In the evening, I go to English Club on Monday, Thursday and Sunday. I have (41) ________ lessons today: Vietnamese, English and PE. My favorite subject is Vietnamese. I have it four (42) _________ a week. Last summer, I went to Ha Noi with my uncle. We (43) ____________ Ho Chi Minh Mausoleum, Hoan Kiem Lake, Dong Xuan Market and Long Bien Bridge. We took a lot of photos. Next summer, my family (44) _______ go to Ha Long Bay. We may explore the caves and swim (45) ______ the sea. We will have a lot of fun. . ác câu sau là đúng hay sai, sửa lại câu sai: 46. ____ Giang lives with her grandparents. 47. ____ She lives on the third floor of a tower. 48. ____ She doesn’t go to school on Saturday and Sunday. 49. ____ She goes to English Club twice a week. 50. ____ She has Science today. 51. ____ She and her uncle went to Ha Noi last summer. 52. ____ Her family may explore the caves at Ha Long Bay. ài : ắp xếp lại các từ sau thành câu hoàn chỉnh: 53. his/ crowded/ parents/ He/ in/ with/ lives/ a/ town/ .  ________________________________________________________________________________ 54. in/ I/ dinner/ the/ cook/ often/ afternoon/ .  _______________________________________________________________________________ 55. study/ I/ a/ twice/ with/ week/ partner/ a/ .  _______________________________________________________________________________ 56. did/ go/ she/ Where/ summer/ last/ ?  _______________________________________________________________________________ 57. you/ Why/ stay/ will/ at/ tomorrow/ home/ ?  _______________________________________________________________________________ 58. think/ and/ Mum/ sunbathe/ will/ Dad/ I/ .  _______________________________________________________________________________

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