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nguyenngocquy5806
2 năm trước
Bài 2: Cho ABC có BA=3dm, BC = 4dm, CA= 5dm. ABC có phải là tam giác vuông không ? Vì sao ? Cho ADC có AC = 5cm; AD = 12 cm; DC = 13cm. ADC là tam giác gì? Vì sao ? Bài 3: Cho tam giác DEF nhọn. kẻ DH EF. Biết DE = 13cm; DH = 12cm; HF = 16cm. Tính chu vi và diện tích DEF. Bài 4: Cho tam giác ABC có AB = 6cm, AC = 8cm và BC = 10cm. a) Chứng tỏ tam giác ABC vuông. b) Kẻ phân giác BD và CE (D thuộc AC, E thuộc AB), BD và CE cắt nhau tại I. Tính số đo góc .
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1. Act 1 (Ex4-p13): Look at the pictures and use the prompts to make complete sentences about traffic problems in big cities in Viet Nam. 1. (example) One / of / traffic problems / our big cities / be / there /be/ too many people / using / roads. => One of the traffic problems in our big cities is that there are too many people using the roads. 2. There / be / too many vehicles / roads. 3. Many roads / be / narrow / bumpy / and / become / slippery / after / rain. 4. There / be/ traffic accidents / every day. 5. Wild animals / run across / road. 6. Many young people / ride / bikes / dangerously. Can you think of more traffic problems in big cities? List them out! 2. Act 2: 1) Read the passage below, underline the traffic problems and number them from 1 to 3. 2) Circle the linking words used to connect the problems. Ho Chi Minh, the city where I live now, has bad traffic problems. There are many reasons for this. Firstly, there are so many vehicles on the streets and alleys, from buses, cars, to motorbikes, bicycles. The city has the most motorbikes in this country. Moreover, the streets are very narrow and poor-quality. They are easily flooded when it rains so heavily. The streets and alleys become bumpy. Many road users don’t obey the traffic rules. They usually drive and ride very dangerously. As a result, there are traffic accidents every day in this city.

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