user-avatar
kimtuyen091985
2 năm trước
cho tam giác ABC cân tại A. trên cạnh BC kẻ đường thẳng vuông góc với BC, cắt AB tại E và cắt AC tại F. Gọi I, K lần lượt là trung điểm của BE và CF a) c/m IDKA là hbh b) tam giác ABC và điểm D có điều kiện gì thì IDKA là hcn, hình thoi
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

1. Her mother walks to the market every morning. → Her mother...... 2. There are 40 cats in her house. → Her house 3. Behind my house there is a police station. The police station is In the neighborhood, there is a bookstore and a drugstore. → My neighborhood has.... 5. Students take a bus to school. ......* 4. → Students ....... 6. They drive to work every day. > They 7. Our sister goes to school on foot. → Our sister.... 8. My house has three bicycles. - There 9. Hoa drives to school every day. She goes... 10. The yard is in front of my house. >My house is 11. A river is to the left of some trees. → Some trees.. 12. There are many trees in my school. > My school...... 13. The toy store is between the bookstore and the bakery > The bakery. 14. Our school is to the left of a big tree > A big tree 15. In front of the house, there are big trees. > The big trees

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