chứng minh bất đẳng thức này đúng

Bài 1: Cho hình thang ABCD, góc A = D = 90 độ Hai đường chéo vuông góc với nhau tại O. Biết OB = 5,4cm; OD = 15cm. a) Tính diện tích hình thang; b) Qua O vẽ một đường thẳng song song với hai đáy, cắt AD và BC lần lượt tại M và N. Tính độ dài MN. Bài 2: Cho tam giác nhọn ABC. Ba đường cao AD, BE, CF cắt nhau tại H. Trên các đoạn thẳng HA, HB, HC lần lượt lấy các điểm M, N, P sao cho góc BMC = CNA = APB = 90 độ Chứng minh rằng các tam giác ANP, BMP và CMN là những tam giác cân. mình đang cần rất gấp ạh, hứa vote 5 sao

Exercise 4. Change the following sentences into passive voice .(in 2 ways) 1. They say that he has done it for two days 2. People hope that the spread of coronavirus in the world will stop soon 3. People have reported that Ha Long Bay is the most beautiful natural wonder in Viet Nam. 4. People say that the coronavirus has killed a lot of people all over the world 5. They expected that more than 100.000 people attended the festivals at the Perfume Pagoda last year. làm nhanh hộ mình với!! Làm bằng 2 cách nhé

giải thích chi tiết có ngay hay nhất nhé gấp lắm nhanh nhé

Giải hộ mình nhé mình đang cần gấp

V)-Combine each pair of sentences, using conditional sentences type 1. 1. A person looks at the sky at night. He is not able to see the Milky Way by naked eye. 2. Noise pollution happens regularly. It causes stress or nuisance. 3. Water pollution gets more serious in the future. It affects the development of economy and society. 4. Australia has invested in water in Viet Nam with good results. Half of the population in the rural areas has access to fresh water. 5. You use compact light bulbs. You save a lot of energy. 6. We have more space. We plant more trees. VI)-Answer the questions, using conditional sentences type 2. 1. What would you do if you had a garden of your own? 2. If you had one wish, what would it be? 3. What would you do if you won €1 million? 4. What would you do to make our school ground greener if you were the principal? 5. What would you do if you were the Earth Hour Goodwill Ambassador? < gấp ah>

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IV. Choose the best answer that need correction: 29. Dennis usually drinks coffee with his breakfast, but this morning he drinks tea instead. A B C D 30.They worked in the garden when it started to rain. A B C D 31.We were surprising to hear he is 50. He looks much younger. A B C D 32. You have never been to Ho Chi Minh City before, haven’t you? A B C D V. Choose A, B, C, or D that is closest in the meaning to each of the following question. 33. It has been a long time since they met. A. They haven’t met since along time. B. . They haven’t met for along time. C. They didn’t meet for along time. D. they didn’t meet a long time a go. 34. It is not necessary for you to wear uniform to school on Sunday. A. You needn’t wear uniform to school on Sunday. B. You must wear uniform to school on Sunday. C. You would wear uniform to school on Sunday. D. You can’t wear uniform to school on Sunday. 35. My children are possible in the living room. A. My children will be playing in the living room. B. My children can not be in the kitchen. C. I don’t know my children are in the living room. D. My children might be in the living room.

children/ household/ young/ with/ tasks/ enjoy/ helping

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