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Cho tam giác ABC cân tại A. Trên các cạnh bên AB, AC lấy theo thứ tự các điểm D, E sao cho AD = AE a) Chứng minh rằng BDEC là hình thang cân. b) Tính các góc của hình thang cân đó, biết rằng góc A = 50 độ ( giải chi tiết ko thì sẽ bị báo cáo )
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X. Read the following passage and choose the item (a, b, c or d) that best answers each of the questions about it. Hoi An is a small town on the coast of East Sea in central Vietnam. Hoi An used to be an important trading center in the 16th and 17th centuries. Today, Hoi An is still a small town, but 'it' attracts a large number of tourists, also being a well established place on the blackpacker trail. Many visit for the numerous art and craft shops and tailors, who produce made- to- measure clothers for fraction of the western price. Several Internet caffes, bá and restaurants have have opened along the riverfront. Som 'popular' evening venuse, especially with western visitors, are Tam Tam's restaur nt and bả and the Mango restaurant. 1. Hoi An ________ a. is a small town b. used to be an important trading center c. attracts a large number of tourists d. all are correct 2. What does the word 'it' in line 3 refer to? a. the coast b. trading center c. Hoi An d. small town 3. In comparison with the western prince, made-to-measure clothes in Hoi An are a. expensive b. not expensive c. cheap d. b & c 4. What does the word 'popular' in line 8 mean? a. like by a lot people b. not special or unusual c. very old d. of the present time 5. ________ is a famous place in Hoi An a. Tam Tam's restaurant and bar b. The Mango restaurant c. a & b d. no information Giúp mik bài này nha mik cần gấp

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