user-avatar
nguyen2007
2 năm trước
Cho đường tròn (O) có các dây AB và CD bằng nhau, các tia AB và CD cắt nhau tại điểm E nằm bên ngoài đường tròn. Gọi H,K theo thứ tự là trung điểm của AB và CD. CMR: EH=EK và EA=EC
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Complete the sentences with one of the following prepositions. Some prepositions can be used more than once. at on in from during between until 1. Liz went on a trip to the countryside with Ba’s family ______Sunday. 2. Swimming is my favourite sport. I often go swimming_____summer. 3. Many offices are closed______the weekend. 4. The end-of-term testd normally take place somewhere____the 15th and 30th of April 5. Let’s wait for John____7 o’clock. After that, we even without him. 6. He was taken to hospital______the night. 7. In England, banks are open______9:00 a.m to 3:00 p.m. 8. He works_____night and sleeps____the day. 9. The school canteen is usually crowded_____lunchtimes. 10. When did you meet Fred yesterday ?____the morning or____noon ? Complete the sentences with one of the following prepositions. Some prepositions can be used more than once. at on in from during between until 1. Liz went on a trip to the countryside with Ba’s family ______Sunday. 2. Swimming is my favourite sport. I often go swimming_____summer. 3. Many offices are closed______the weekend. 4. The end-of-term testd normally take place somewhere____the 15th and 30th of April 5. Let’s wait for John____7 o’clock. After that, we even without him. 6. He was taken to hospital______the night. 7. In England, banks are open______9:00 a.m to 3:00 p.m. 8. He works_____night and sleeps____the day. 9. The school canteen is usually crowded_____lunchtimes. 10. When did you meet Fred yesterday ?____the morning or____noon ?

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