Cho tam giác ABC vuông tại A. Tia phân giác góc ABC cắt AC tại E. Trên tia đối của tia AE lấy F sao cho AF= AE. Kẻ CH vuông góc BE cắt AB tại K. Chứng minh: a) BE=BF b) Góc ECH = góc EBC c) Tam giác BCK và CEK cân d) KE vuông góc BC. e) Gọi KE cắt BC tại G. Chứng minh: góc BFA =góc BEG cần gấp giúp với ạ

GIÚP MK VỚI , NHANH NHA MK CẦN GẤP LẮM RÙI 3H30 XONG NHA CẢM ƠN CÁC BẠN NHÌU TRẢ LỜI ĐÚNG VÀ NHANH MK SẼ CHO CTLHN NHA !!

Cho hình vẽ đầu cá cmr xã // by

Viết bài văn nói về hoạt động của bản thân nó có lợi bằng tiếng anh và hại gì?

Vẽ bé gián cute (như avt của mình) buồn rưng rưng nước mắt (;ω;) Thêm vào dòng chữ "H..hãy ôm em nhé..." :)))))

Giúp mik phần D với ạ cảm ownn........

Calli Gone tone hồng tím pastel (không nhận tím đậm, có bóng, line đủ)

Chung minh rằng x2+2x+3)0với mọi x

Hơi nhìu giúp em vs ẹ . lẹ lên nghen

1. How can we make history accessible…..children? A. with B. for C. to D. of 2. Mike: “Excuse me! Where’s the post office?" - Passer-by: “……..” A. I'm afraid not B. Don’t worry C. Yes, I think so D. It’s over there 3. Kate: "What shall we do this evening?" - Karl: “…..” A. Let’s go out for dinner B. No problem C. Oh, that’s good! D. I went out for dinner 4. John: “…..?” - Kim: “He is tall with fair hair” A. What does he like B. How is he C. What does he look D. What does he look like 5. This university,.....was founded in 1910, is very famous. A. where B. which C. what D when 6. I’d rather you.....me to school tomorrow. A. will drive B. drive C. driving D. drove 7. Are you ready.....to the tape yet? A. listening B. to listen C. for listening D. on listening 8. .....many people are overweight, many don’t have enough to eat. A. because B. if C. while D. as 9. We must save our natural.....right now. A. resources B. sources C. fuels D. energy 10. Why do you look so.....today? A. bored B. boredly C. boredom D. boring 11. All of us must.....our best to carry out our plan. A. try B. make C. work D. put 12. I’m not used.....up late. A. to staying B. to stay C. staying D. with staying 13. I was very happy…..your letter. A. to receive B. that I received C. receiving D. because I received 14. I am very.....your society and should like to have more details. A. concerned about B. interested in C. involved with D. absorbed by 15. In recent years, more and more people…paying for things with credit cards. A. pay B. paid C. are paying D. have been paying 16. A soldier has to learn to…..orders as soon as they are given. A. turn in B. run for C. bring about D. carry out 17. They’ll have to…..water supplies while repairs are carried out. A. cut off B. take down C. break up D. set up 18. Could you please…..my laptop while I am out? A. touch down B. keep on C. look after D. take after 19. I went to see some pictures…..a new painter the other day. A. by B. of C. from D. about 20. The government made serious attempts to raise the…..of living. A. level B. standard C. cost D. mode III. Correct a mistake 1. If I were you, I won't buy an expensive car for your son. 2. In order an object to be visible, light must travel from that object to a person’s eyes. 3. All of the films I’ve ever seen, this is the most interesting. 4. Pigeons, like many migratory birds, read the positions of the sun and stars so as to orient them. 5. The young emperor chick stands in front of one of its parents to protect from the cold. 6. Dreaming, like all other mental processes, it is a product of the brain and its activity. 7. I don’t know why is he interested in reading novels by this writer. 8. Each of the luxury cars in the showroom was quickly sold to their new owner. 9. In the long run, the future population growth of the world is difficult for predicting. 10. Though she has changed a lot, but you will have no difficulty recognizing her. Giúp với ạ !!!