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Đỗ Bảo Ngọc

một hình thang có đáy lớn 12cm , đáy bé 8cm và diện tích bằng diện tích hình vuông cạnh 10 cm tính chiều cao hình thang ?
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nếu câu trả lời hữu ích nhé!

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Phương pháp giải:

1. Ta biết diện tích hình vuông cạnh 10 cm là 10 * 10 = 100cm^2.
2. Diện tích hình thang được tính bằng công thức: (đáy lớn + đáy bé) * chiều cao / 2.
3. Gọi chiều cao của hình thang là h.
4. Ta có phương trình: (12 + 8) * h / 2 = 100.
5. Giải phương trình ta được: 20h = 200 => h = 10.

Vậy chiều cao hình thang là 10cm.

Câu trả lời: Chiều cao của hình thang là 10cm.

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51 vote
Cảm ơn 8Trả lời.

Phương pháp làm bài tập:
1. Đọc và hiểu câu hỏi cẩn thận, đảm bảo hiểu rõ yêu cầu của câu hỏi.
2. Phân tích các yếu tố trong câu hỏi để hiểu rõ ngữ cảnh và mục tiêu của câu hỏi.
3. Đọc lại câu hỏi gốc và tìm các từ khóa để tìm kiếm thông tin liên quan.
4. Sử dụng kiến thức, kỹ năng và ngữ pháp Tiếng Anh để trả lời câu hỏi.
5. Kiểm tra lại câu trả lời để đảm bảo tính chính xác và ngữ pháp.
6. Viết câu trả lời theo yêu cầu của câu hỏi.

Câu trả lời cho từng câu hỏi:
I. Complete each of the sentences in such a way that it has the same meaning as the first one:
1. It would be a good idea if you did it again. -> You had better do it again.
2. They advised repainting the house. -> They suggested repainting the house.
3. I can't afford to go on holiday this year. -> I haven't got enough money to go on holiday this year.
4. He paid little attention to his brother's warnings. -> He didn't take his brother's warnings seriously.
5. Fred tried hard to start the car, but without success. -> No matter how hard Fred tried, he couldn't start the car.

II. Use the words given to make complete sentences:
1. I like to find more about the film before I see it.
2. He should apologise for being late and disappointing her.
3. I expect to be helped by him.
4. It will be his first visit to the USA next year.
5. The only reason I made a serious mistake was that he hadn't warned me.
6. All the witnesses said that the accident was my fault.
7. I'd rather you not phone me at work.
8. Sarah's good manner made the interview panel think highly of her.
9. It's characteristic of Tom to be usually late for class.
10. He remembered and she didn't forget.
11. You can borrow the car, provided you fill it up.
12. It was while he was on holiday in Wales that he wrote that book.
13. I'd like to visit Italy the most.
14. Mary didn't work hard enough, so she failed her exams.
15. My father said to me, "If you have to go out, finish your homework first."
16. Tired as we were, we agreed to have a game of tennis.
17. The robbers made the customers lie on the floor.
18. The computer she bought was very cheap.
19. Much as I really like that car, I can't afford it.
20. However much the frame weighs, this rope will support it.
21. There are increasing numbers of global travel around the world.
22. There has been no change in the popularity of books nowadays.
24. What I found surprising was her lack of confidence.
25. Births rather than deaths are the reason for the high proportion of the old.
26. There is no instant solution to this problem.
27. She was considering paying the bill.
28. Jenny and Kate had a happy upbringing.
29. Jack is always spending all his time working.
30. It is really time for me to go now.
31. He broke the world record on his second attempt.
32. He couldn't possibly have known that his brother was seriously ill.
33. I was particularly impressed by her excellent command of English.
34. At no time was the result of the match in doubt.
35. There was quite unjustified violent criticism of the Prime Minister.
36. The more wool-pulp people use, the more trees are cut down.
37. Under whatever situation it is, you have to stay calm.
38. I'd like to have gone to the party, but I couldn't.
39. How can I make up for what I have done?
40. The thief almost certainly came in through the window.
41. I'd rather he hadn't said all those embarrassing things about me.
42. The likelihood of him succeeding this time is low.
43. I couldn't have finished the job so quickly without Jane's help.
44. Our presence is not granted by her.
45. Our prices may be increased without warning.
46. You and I have identical pearl earrings.

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51 vote
Cảm ơn 4Trả lời.
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