Bài 4(3.5đ) Cho đường tròn (O;3cm), từ điểm A nằm ngoài đường tròn tâm O, vẽ hai tiếp tuyến AB, AC đến đường tròn tâm O (B, C là hai tiếp điểm, AB = 4 cm) và cát tuyến AEF sao cho điểm E nằm giữa A, F (BE < EC). BC cắt OA tại H, AF cắt BC tại D. a. Tính OA, BC b.Chứng minh AB2 = AE.AF. c.Gọi I là trung điểm của EF. Chứng minh AD.AI = AE.AF.

Các anh chị ơi giúp em với ạ , em đang cần gấp ạ 🙏🙏🙏😭😭😭

mấy bạn ơi giải giúp mình bài này với. cảm ơn nhiều ạ 💜

Giúp mik giả đầy đủ nha mọi người

Cho mk xin cách lm câu 5 ạ , mk cần gấp

Giúp em với ạ 😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃🐶

Mong mấy bạn giúp mình ạ cho mình cảmơn nhều .

Tính:-|-102|+[(-3^2)×(-2)-(-8)]:13

1. Both my brother………………….…… I dream of becoming a TV MC. 2. My sister is good at school……………………….……. I am not. 3…………………………. . we tried our best, we didn’t win the game. 4. Peter stayed at home …………………. He was ill. 5. I am tired, …………………………………………… I will go to bed early. II. Rewrite sentences with “but, and, so, because, although”. 1. I don’t watch news. It is boring. (because) ………………………………………………………………………………………………… 2. She is seeing a movie at cinema. The film is terrifying. (but) ………………………………………………………………………………………………… 3. The programme is boring. The MC is bored. (and) ………………………………………………………………………………………………… 4. I have a lot of homework tonight. I can’t watch Eight Feet Below. (so) ………………………………………………………………………………………………… 5. BBC The Coast is a famous TV series. I have never watched it. (although) ………………………………………………………………………………………………… III. Read the passage and answer these questions below: Hoa is a new student in class 6A. She is from Da Nang and her parents still live there. She lives with her uncle and aunt in Ha Noi. Hoa has lots of friends in Da Nang. But she doesn't have any friends in Ha Noi. Many things are different. Her new school is bigger than her old school. Her new school has a lot of students. Her old school doesn't have many students. Hoa is unhappy. She misses her parents and her friends. 1. Where is Hoa from? ………………………………………………………………………………………………… 2. Who is she staying with? ………………………………………………………………………………………………… 3. Does she have a lot of friends in Ha Noi ? ………………………………………………………………………………………………… 4. Why is Hoa unhappy? ………………………………………………………………………………………………… IV. Match the questions (A) and the answers (B). A B 1. How often do you watch football on TV? 2. Where is Hollywood? 3. What channel in the film on? 4. What time is the cartoon on? 5. What is the name of your favourite TV programme? 6. Why do you like the programme? 7. How many hours a day do you watch? 8. Who is the director of the film? 9. When did John Logie Baird make the first TV set? 10. Why do you like cartoon? a. In 1926. b. It’s on VTV3. c. In California, USA. d. Because it’s very exciting. e. About two hours a day. f. Because they are colourful and funny. g. It’s Steven Spielberg. h. It’s at 7.30 pm. i. It’s the science programme. j. Twice a week. Usually at weekend. V. Complete the sentences with and, so, but or because. 1. I didn't feel_____________ well I stayed at home. 2. He liked her____________ she was happy. 3. I liked Spain_____________ I wanted to go home. 4. She likes swimming_____________ jogging. 5. We were late____________ there was an accident. VI. Match the sentences halves and write the answer in each blank. A B 1. I lost my money 2. She likes you a lot 3. I looked for the key 4. My friends were ill 5. The film starts at ten 6. I got good marks on the test a. so I couldn’t buy anything. b. because she thinks you are very intelligent. c. and had to stay at home. d. because I studied very hard. e. but I just couldn’t find it. f. so we couldn’t be home by eleven. VII. Put the word from the box in each space to complete the following sentences. news popular live volume weather man 1. MyTam’s_______________ show at Lan Anh Stadium will be on TV next Sunday. 2. The Voice Kids is a______________ programme. Everyone watches it on Saturday nights. 3. The_______________ programme is on VTV3 at 7pm every day. 4. I want to be a_____________ in the future to tell people what the weather’s like. 5. Could you please turn down the________________? It is too loud. VIII. Complete the following sentences with the words in thebox. and but so because although 1. Children love cartoons________________ they make them feel happy. 2.____________ the newsreader speaks really fast, my father can hear everything. 3. The animal programme is so late____________ I can’t wait for it. 4. Some game shows are popular,_____________ I never watch them. 5. My sister is a weather woman, ___________my father is a newsreader.

156: 4,8= ? Giải giúp tớ tớ đg bị mất sách rồi :((