Cho tam giác ABC có góc A bằng 70 độ, AB=6 cm, AC=10 cm. tính diện tích ABC. giúp mình với ạ

Các câu hỏi liên quan

Exercsie 4 : Make questions for the underline words 1. Sarah left two hours ago. ......................................................................................................................... 2. She is watching Tom and Terry. ......................................................................................................................... 3. I felt terrified before my last Maths test. ......................................................................................................................... 4. It is 10 kilometers from here to ACB bank. ......................................................................................................................... 5. I have known Marie for nine years. ......................................................................................................................... 6. We should use biogas for cooking instead of gas. ......................................................................................................................... 7. Nuclear power can’t be used popularly because it is dangerous. ......................................................................................................................... 8. Yaly Hydropower Plant was constructed in 1993. ......................................................................................................................... 9. There are seven types of renewable energy. ......................................................................................................................... 10. Vietnamese people go to pagodas at Tet to pray for a year of good luck and happiness. .........................................................................................................................

2. Read the text and choose the correct answer. Advantages of mobile phones for students It's clear to all that mobile phones are really useful for students. students have a mobile phone, then itťs easy to contact anyone at their needs. For example, if a student has some problem in school or on the street after school, he can contact their parents immediately. So, the mobile phone is one of the best solutions for any emergency situations. And mobile phone also is a great equipment in order to improve knowledge and communicate with the world. Early morning it works as an alarm clock. Also, it works as reminder if you put some notes on reminder. You can take photos or listen to music anywhere you like. You can manage your spending or receiving money with the help or money management apps. You can use the mobile phone as your personal diary. For these reasons, each student should have a mobile phone. 1.The text is about_ A. advantages of mobile phones for students. B. disadvantages of mobile phones. C. students use mobile phone all day. 2. For emergency situation, students can A. take some photos. B. contact their parents immediately. C. take a taxi to home. 3. Mobile phone can work as in early morning. A. alarm clock. B. reminder C. money manager. 4. Should students use mobile phone? A. Mobile phone is very useful. B. Yes, they should C. No, they shouldn't. Read the text again and answer the questions. 1. What should students do when they have some problem in school or on street? 2. Is mobile phone great equipment for students to communicate with the world? 3. What can we do with money management apps? 4. Do you think that each student should have a mobile phone?