Cho đoạn thẳng AB=7 cm.Lấy điểm C thuộc đoạn thẳng AB sao cho AC=2cm . Trên cùng một nửa mặt phẳng bờ AB vẽ 2 tia Ax bà By vùng vuông góc với AB.Lấy điểm D thuộc tia Ax,điểm E thuộc tia By sao cho AD=10cm,BE=1cm. a)Tính độ dài các đoạn thẳng DC,CE b)Chứng minh rằng DC vuông góc CE

Cho biểu thức A = 3/n+ 2 với n là số nguyên a, điều kiện gì Của n để A là phân số. b, Tìm a biết N = 0 ,n = 2, n = 7 c,Tìm n để a là số nguyên.

Cho tam giác ABC,góc B=60 độ.Tia phân giác góc B cắt AC tại D. Đường thẳng qua A song song BD và cắt BC tại M. Đường thẳng qua A vuông góc BD và cắt BD tại H và cắt BC tại N.Biết AN=2 cm. Chứng minh a. Tam giác ABM cân b.Tam giác ABN đều c.Tam giác AMN vuông d. AM=căn 12cm ( Có vẽ hình ) CÁC BẠN GIÚP MÌNH VỚI,NGÀY MAI MÌNH PHẢI NẠP RỒI !

IV. Complete the conversation with the words in the box: interested cinema films fantastic relaxed amazing successful section boring awards 1. I am very _______________ in watching TV late on Saturday evenings. 2. His film has won a lot of _______________. 3. All the critics said the film was really ________. Nevertheless, I was so interested that I saw it from beginning to end. 4. Avatar is a big hit – the special effects are __________. 5. If you want to know which films are on the cinemas, you should look at the film______ of this magazine. 6. I feel very ________ when I see romantic comedy. 7. Spiderman 2 has a lot of _________ action scenes. 8. Have you ever been to the _______ lately? 9. What type of _________ do you like, Nick? 10.Kristen Dunst’s most _______ films are the Spiderman films. V. Complete the conversation with the correct form of the adjectives in brackets. 1. A: Was it a good film? B: No, it wasn’t very (interest) _______. In fact, it was very (bore)___ ____. 2. A: I’m always very (tire) _______ after a day at work. I can’t do anything in the evening. B: Why don’t you watch a film? A: I always fall asleep. Sometimes, I put on the most (excite) ______film that I really want to see but I always fall asleep. 3. A: I’m an actor. Acting is a very (tire) ___ job. It isn’t (relax)_____ __ at all. Are you (relax) ____? B: No way. I’m a worker. VI. Complete the sentences with the correct form of the adjectives in brackets. 1. I was very ________ in the lesson because our teacher is very_________ in history. (interest) 2. My friend is a very ________ sort of person but he hates doing_______ activities. (relax) 3. Studying for exams is very _______ I get ______ when I open my school books. (tire) 4. We were all very ______ about the school trip but it wasn’t an ________ trip at all. (excite) 5. It’s a ________ book and I’m _________ every time I start eading it (bore)

Qua điểm A nằm ngoài đường tròn (O) vẽ hai tiếp tuyến AB,AC của đường tròn gọi E là Trung điểm của AC,F là giao điểm thứ hai của EB vs đường tròn (O).Chứng minh tứ giác ABOC nội tiếp và tam giác CEF đồng dạng tam giác BEC

Các bạn ơi làm hộ mình bài 1nhé

QUESTION 4. Give the correct form of the verbs in brackets to complete the following sentences. 1. What ………………you (do) ……………….at the moment? I (watch) …………………TV. 2. We (be) ………………………………………………students in four years. 3. A little girl can't spend all her time (listen) ……………………………… to stories.  4. We (play) …………………soccer this afternoon. Would you like (join) …………………………..? 5. You can borrow my umbrella. I (not/ use) ……………………….. it at the moment. 6. Look! The plane (fly) ………………………………………. towards the airport. 7. Nam (not visit) ………………………. the museum with his class last Sunday because he had a cold.  8. We (have) ……………… a birthday party last week and a lot of people (join)………………………… II. Complete the sentences, using although, despite, in spite of, however, or nevertheless. 1. I think I did OK in my speech last night _____ I’d had almost no sleep for 24 hours. 2. ______ I heard the telephone ring, I didn’t answer it. 3. We enjoyed our holiday_______ the rain. 4. _____ he got top marks at high school, he never went to university. 5. _____ there was no electricity, I was able to read because I had a candle. 6. She failed the test ________ she studied hard. 7. _____ difficulties, the firemen managed to save many people who were caught in the fire. 8. Everyone thought she would accept the offer. _____, she turned it down. 9. Carol arrived at the meeting _____ I asked her not to be there. 10. It looks like they’re going to succeed _____ their present difficulties. 11. _____ it was raining heavily, he went out without a raincoat. 12. My father is very busy. ______ , he is always willing to give a hand with the housework. 13. The sky was grey and cloudy. ________, we went to the beach. 14. Some English words have the same pronunciation _______they are spell differently, for example, dear and deer. 15. I was cold and wet _______ .Bob put on his swimming suit and went to the beach.

fill in each gap with an appropriate preposition 1)the teacher divided class four groups 2)he provide us a lot of useful information 3)the ground is covered trash you should clear all the trash 4)raw sewage is pumped directly the sea 5)they are trying to save the animals extinction 6)the world will end like a second-hand junk-yard 7)i am looking forward hearing from you 8)don't throw trash the water

Bài 2:lập "phương trình đường thẳng theo đoạn chắn "của đường thẳng Đi qua 2 điểm M(2,0);N(0,-3)

Câu 1 : GHĐ , ĐCNN của thước là gì ? Cách đo thể tích chất lỏng ? Câu 2 : Các dụng cụ đo thể tích chất lỏng ? Cách đo thể tích chất lỏng ? Câu 3 : Cách đo thể tích vật rắn không thấm nước ? Câu 4 : Khối lượng 1 vật cho ta biết điều gì ? Câu 5 : Lực là gì ? Thế nào là 2 lực cân bằng ?