Một hình thang cân có đường cao bằng nửa tổng hai đáy. Tính góc tạo bởi hai đường chéo hình thang.

Cho tam giác ABC vuông tại A. Tính các tỉ số lượng giác của góc C, biết rằng: a) AB=12,5cm và AC=6,4cm b)Đường cao AH, AC=13cm và CH=5cm c) Đường cao AH,CH=6cm và BH=4,5

Cho `x <2` . Tìm GTNN của `P =1-3x +3/{2-x}`

Tính GTNN Mình cần rất rất gấp lời giải chi tiết 2 phần này. đề bài là tính GTNN. Mọi ng giúp mình vớiiiiiiiiiiiiiiiiiiiii ak. mình cảm ơn

Lam giup minh 5 cau trac nhiem voi 1.She works hard to improve her teaching techniques___________sheloves her students. A.because b.so C.although D. but 2.If you want to_______weight, you need to cut down on soft drink. A.waste B.lose C. cut d.close 3.If you are not satisfied with the product, you can_________about it. a.report B.informC.speakD.complain Let’s buy this pink purse forMum!” Selena: “________” A.Good idea! B.Yes, you’re right. C.I’m fine, thanks. D.You must be a fool.

calli: came on in vietnam lên ảnh này nha

I. Read the passage and do the tasks that follow. ____________________________ Playing football on the beach, samba dancing at night, relaxing with a delicious ice-cold fruit juice in an outdoor café, meeting sociable, hospitable people: this is what I think of when I remember the beautiful city of Rio de Janeiro. ____________________________ Rio is called "The Marvellous City" for a good reason. It is in an extraordinary location in Guanabara Bay, surrounded by spectacular mountains and by impressive sandy beaches facing south onto the Atlantic. The views almost everywhere in the city are breathtaking. ____________________________ There is something to do in Rio 24/7. In the morning, you can visit the centre with its museums and picturesque, historic churches or go up Mount Christ with Corcovado to see the eye-catching statue of Christ with its stunning views. In the afternoon, you can relax on the beach and watch the world go by or join in a football game with the welcoming, good-natured locals. Or you can go to the striking Maracana Stadium to watch the professionals play. At night, there is music and dancing everywhere. Even if you are not a brilliant samba dancer, you will have an amazing time. ____________________________ Of course, Rio does have problems. There are enormous areas of depressing slums on the hills around the city and violent crime can be a problem, though the situation has improved recently. However, for me Rio is one of the most fascinating places in the world and Cariocas the warmest people, so I cannot wait to go back! Task 1. Match the paragraphs (1-4) with the subheadings (A-D), and write the answer in each blank. A. The city's landscape B. opinion of the city C. Memories of Rio D. What to do in Rio Task 2. Match the adjectives in italic in the passage with the meaning (A-C). Write the answers in each group. A. Very attractive to look at: _________________________________________________________________ _______________________________________________________________________________________ B. Fantastic or very good: ____________________________________________________________________ _______________________________________________________________________________________ C. Friendly and pleasant: ____________________________________________________________________ _______________________________________________________________________________________ Task 3. Which of the adjectives do we use to describe people and which to describe food? Write the answers in each group. A. People: ________________________________________________________________________________ _______________________________________________________________________________________ B. Food: _________________________________________________________________________________ _______________________________________________________________________________________

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