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tuanlelove513
2 năm trước
Cho đường tròn (O; R), đường kính AB. M là điểm bất kì trên đường tròn (O). Gọi E là điểm chính giữa của cung nhỏ AM. Các đường thẳng AE, BM cắt nhau tại K. Đường thẳng BE cắt AM tại H và cắt đường thẳng vuông góc với AB tại A ở điểm N. a) Chứng minh tứ giác EKMH nội tiếp. b) Khi AN = R. Hãy tính độ dài đoạn thẳng BN và số đo góc ABM. vẽ hình giải nhanh giúp mình ạ,mọi người giúp đi ạ nãy giờ không ai giúp cả. mình sắp nộp bài rồi ạ ko ai giúp ạ :((
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Reading 2: Situated on the central coast of Vietnam, which is famous for many beautiful beaches. Lang Co Beach, since June 2009, has become an official member of the “World’s most beautiful bays” club. Today, it is a popular destination for tourists in Vietnam, especially for those who love beach so much. With the length of approximately 10 kilometres, Lang Co Beach located in Lang Co town, Phu Loc district, Thua Thien- Hue province is next to the National Highway 1A and near Hai Van Pass. Lying on the most beautiful curve of the country, Lang Co has almost everything that the nature can offer: green mountains and tropical forests, smooth white sand, full of sunshine and cool, blue and clear sea as crystal, and the average temperature of 250C in summer. It is an attractive destination for both domestic and international tourists in Vietnam. It is the third bay of Vietnam, after Ha Long and Nha Trang named in the list of 30 most beautiful bays in the globe. It can be said that nobody can resist a nature beauty like Lang Co town. This small and peaceful town will give you the most relaxing time and many games at the beach. In addition, you will have good time to enjoy the seafood with various kinds of shrimps, lobster, crab, butter-fish, mackerel fish, oysters, etc. and not far from the beach are some attractions such as Kang Co fishing village, Chan May scenery. Lying on the "Central Heritage Road", Lang Co is very close to other famous attractions such as the Imperial City of Hue, Hoi An Ancient Town, Son Tra Peninsula where the famous Son Tra Natural Reserve and beautiful beaches located, and so many more. 1. Lang Co beach is located _______. A. between Hoi An Ancient Town and Son Tra Peninsula B. on the most beautiful curve of Vietnam C. 10 kilometres away from Hue D. under Hai Van Pass 2. The most important reason why so many tourists come to Lang Co beach is that ____________. A. it is the third most beautiful beach in Vietnam B. they can enjoy various kinds of seafood C. they can come to the famous Son Tra Natural Reserve D. it is considered an ideal place for beach lovers 3. All of the following are attractions of Lang Co Beach EXCEPT _______. A. the National Highway 1A next to it B. smooth white sand, and full of sunshine C. cool, blue and clear sea as crystal D. its location on the "Central Heritage Road" 4. We can infer from the passage that Lang Co Beach _______. A. is very hot during summer B. is the most beautiful bay in the world C. enjoy the harmony of nature and humans D. is the first member of the “World’s most beautiful bays” club in Vietnam 5. Coming to Lang Co Beach, you can do all of the following activities EXCEPT __ A. relaxing and joining in beach games B. sunbathing on many beautiful beaches C. visiting the nearby fishing village D. enjoying seafood NHỚ GẠCH DẪN CHỨNG NHA

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