Cho góc nhọn xOy ; trên tia Ox lấy hai điểm A và B ( A năm giữa O,B) . Trên tia Oy  lấy hai điểm C,D ( C năm giữa O , D ) sao cho OA = OC và OB = OD . Chứng minh : a> tam giác AOD = tam giác COB ; b>tam giác ABD = tam giác CDB ; c>gọi i là trung điểm của AD và BC . Chứng minh IA = IC ; IB = ID 

mik cần gấp lém lun mong các bạn giúp mik bạn nào làm đúng nhanh dài thì mik like lun cho nha ^^

nhớ vẽ hình hộ mik lun nhé^.^  cảm ưn mấy bạn trước lun nha><

Mọi người giúp mình vs ạ!!! Cần gấp!!! Có giải thích lun ạ!! Mk xin cảm mơn nhìu nha!!

A. PRONUNCIATION 1. Choose the word that has a different stress pattern from the other three by circling A, B, C, or D. 1. A. abroad B. degree C. exchange D. further 2. A. credit B. divide C. major D. master 3. A. distance B. level C. prefer D. student 4. A. academic B. analytic C. education D. expectancy 5. A. importance B. voluntary C. employment D. relation 6. A. scholarship B. doctorate C. linguistics D. practical 7. A. critical B. doctoral C. graduate D. supportive 8. A. information B. institution C. presentation D. vocational 9. A. opportunity B. personality C. qualification D. university 10. A. advantage B. bachelor C. primary D. secondary 2. Practice saying the following sentences with a partner. Pay attention to the intonation of yes-no and wh-questions. 1. A: Hey, where are you going? B. I'm going to the library to collect a book 2. A: Hi. What can I do for you? B. I've been looking for the Institute of Professional Learning 3. A: Are there any opportunities for students to pursue vocational education in your country? B: Yes, of course. 4. A: How did you learn about the scholarship? B: My teacher recommended it to me. 5. A: When do you plan to pursue further education? B. Immediately after I get my bachelor's degree 6. A: Why do you need to look for a part-time job? B. I need to pay for my tuition fees. 7. A: Have you ever thought of studying abroad? B: Yes, I've been granted a scholarship to study in Australia. 8. A: I intend to take a gap year after leaving secondary school. B: Really? What's it for? 9. A: You look so tired. Why don't you take a break? B. I have to submit my assignment by 5p m. today. 10. A: How long does it take to get a master's degree? B: Approximately two years