user-avatar
quanvn
2 năm trước
Cho ∆ABC vuông tại A, tia phân giác của cắt AC tại D. Vẽ DE vuông góc với BC tại E. 1) Chứng minh ∆BAE cân 2) Gọi F là giao điểm của hai đường thẳng AB và DE. So sánh DE và DF 3) Gọi H là giao điểm của BD và CF. K là điểm trên tia đối của tia DF sao cho DK = DF, I là điểm trên đoạn thẳng CD sao cho CI = 2DI. Chứng minh rằng K, H ,I thẳng hàng
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Correct the mistakes: a. When I will go to school tomorrow, I’ll tell you about our plan. b. He ate a lot of green apples , and he has a stomachache now. c. I find sewing is very useful. d. Mr. Tuan is a farmer. He loves work on the farm. e. I think eat too much meat is not good for our health. f. You are putting on weight. Do more exercises and to eat less fatty food. - Has peer- correction first, then gives the key II: Complete each sentence so it means the same as the sentence above. 1. I didn’t go to school because I was sick.  I was sick, so ………………. 2.It will be good if you eat less meat and more vegetables.  You should ……………… 3. He likes playing computer games in his free time.  His hobby is …………….. 4. I am interested in watching TV in the evening.  I enjoy ………………… 5.I think that learning English is important.  I find ………………….. III. Choose a-f to complete the conversation Mi: Nga, what is your favorite hobby? Nga : (1)……………………………….. Mi: Why? Nga (2)……………………………….. Mi: When did you start your hobby? Nga (3)……………………………….. Mi: Do you share this hobby with anyone? Nga (4)……………………………….. Mi: Is it difficult to cook? Nga (5)……………………………….. Mi: Where do you get the recipes? Nga (6)……………………………….. a. I don’t think it’s difficult because I like it very much. b. I love cooking c. Most of the time learn from my mom. Sometimes I get them from the internet. d. It’s great when I see other people enjoy my food. e. yes. My mom love it too. f. When I was six years old, my mom taught me how to cook my first dish.

I.Change the following sentences of past continuous tense into passive voice. 1.Peter was riding a buffalo in the filed at 4p.m yesterday. A buffalo was 2.They were watching TV when I came. TV was.................................................................................................................. 3.Students were cleaning the school yard very quickly. School yard............................................................................................................ 4.Were you having lunch when she came? Was lunch............................................................................................................... 5. We were not helping the women when it started to rain. When it started to rained, the women...................................................................... 6. I was not teaching English when it started to rain. English wa not........................................................................................................ 7. People were not playing the cello at this time last year. The cello................................................................................................................. 8.He was not using the computer at that time. The computer was...................................................................................................... 9.Duong was doing the projects this time last year. The projects.................................................................................................................. 10. Were people eating black pudding this time ten years ago? Was...............................................................................................................................

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team