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cho ∆ABC cân tại A, vẽ AH vuông góc BC tại H a) chứng minh: ∆ABH = ∆ACH. Suy ra H là trung điểm của BC b) từ H kẻ HE vuông góc AB tại E, HF vuông góc AC tại F. Chứng minh HE = HF c) chứng minh EF // BC giúp mik nha mn hứa sẽ vote 5 sao
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How Nam has improved his English In the first year of lower secondary school, I had some difficulties in learning English. My English pronunciation was really bad and my English grammar was worse. I did not know how to improve them. I didn’t want my father and mother to know about this. One afternoon after the lesson, my teacher of English told me to wait for her outside the classroom. She took me to the school library and showed me cassettes of pronunciation drills kept in a glass bookcase. She also told me how to use an English - English dictionary to improve my English grammar. “Now I think you know what you should do”, said she. I made much progress and only one year later, I won the first prize in the English Speaking Contest held for secondary school students in my hometown. 1. What difficulties did Nam have in learning English in the first year? A. The pronunciation B. The grammar C. Both pronunciation and grammar D. The way of improving his pronunciation 2. Who wanted to meet him one afternoon after the lesson? A. His teacher B. One of his friends C. His father D. His mother 3. Where did Nam and his teacher go after that? A. to the town library B. to the school library C. to the teachers’ room D. to his house 4. What did the teacher show him then? A. A glass bookcase B. An English-English dictionary C. An English Grammar book D. Cassettes of pronunciation drills 5. What did he win in the English Speaking Contest one year later? A. The first prize B. The second prize C. The third prize D. The fourth prize

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