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chia mỗi cạnh của một tứ giác thành 3 phần bằng nhau rồi nối các điểm chia tương ứng trên các cạnh đối diện,ta được 4 đoạn thẳng chứng minh: mỗi đoạn thẳng trong 4 đoạn thẳng ấy đều bị chia thành 3 phần bằng nhau
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Tokyo is the capital of Japan. In Tokyo, there are always too many people in the places where you want to come. People are very polite even when they often spend a long time on traffic jams. Tokyo is different from London when you want to walk to a place. During the day, most people travel to work by train. Tokyo people buy six million train tickets every day. Although they are usually crowded, Japanese trains are very good. They always leave and arrive on time. On a London train, everybody in a seat seems to be asleep, whether the journey is long or short. They worst time to be in the street at night is about 11.30 when the nightclubs are closing and everybody wants to go home. 1. What city is the capital of Japan? 2. How do the most people travel in Tokyo? 3. Are Japanese people tired on traffic jams? 4. Are the trains in London good? 5. When does the writer think the worst time to go into the street?

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