Cho đường tròn(O;R).Từ điểm M nằm ngoài (O;R) vẽ hai tiếp tuyến MA MB (A,B là 2 tiếp điểm). Lấy điểm C bát kì trên cung nhỏ AB(C khác AB). Gọi D,E,F lần lượt là hình chiếu của C trên AB,AM,BM. Gọi I là gio điểm của AC và ED,K là giao điểm của CB và DF. Chứng minh IK//AB

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mn ơi giúp mk vs mk đang cần gấp Put the following sentences into the reported speech. 1. “Helen, would you like to come to my birthday party tonight?” said Mary. Mary........................................................................................................... 2. “You’d better go and see the new film at the Odion, Bob?” I said. I ................................................................................................................. 3. “Don't forget to post my letter, Ann,” said my father. My father ................................................................................................... 4. “Shall we go somewhere for lunch?” said one of the students. One of the students ................................................................................... 5. My sister said, “How about eating out tomorrow night?” My sister .................................................................................................... 6. “Would you like some more wine?” Tom said to me. Tom............................................................................................................. 7. Tim said, “Shall I get you some cold water?” Tim ............................................................................................................. 8. He said, “Let's find somewhere for a drink as I’m tired and thirsty.” He............................................................................................................... 9. She said, “If I were you, I wouldn’t buy that T-shirt.” She ............................................................................................................. 10. “Could you go out and get me a newspaper?” said Tom’s father. Tom’s father.................................................................................................