Cho tam giác ABC vuông tại A, kẻ AH vuông góc với BC. tia phân giác của góc HAB cắt BC ở D, tia phân giác của HAC cắt BC ở E. Chứng minh rằng: giao điểm các đường phân giác của tam giác ABC là tâm đường tròn ngoại tiếp của tam giác ADE. Các bạn giúp mình với!Mình cần gấp!!!!

zẽ mầm cko mị nka kute (k kute= bc)

Mềnh xin nhận xét đc hăm ạ? Góp ý để cải thiện nét ;-; ________________________________________ Dzẽ anime/chibi cổ trang Full line Màu hay ko thì tùy Digi/ tradi tùy Có kí :33

Từ 4 câu thơ đầu của khổ thơ thứ 3 trong bài thơ quê hương hãy viết một đoạn văn diễn dịch khảng 10 câu tả lại cảnh đoàn thuyền về bến trong đó có sử dụng 1 câu cảm thán. Giúp mình với

tìm a,b biết đường thẳng y=ax+b cắt parabol y=x^2 tại 2 điểm A và B cso hoành độ lần lượt là 2 và -1

-Five one mistake in each of the following sentences.Write your answers in the space provided- Question 1:(It) was not easy (for) us (getting) tickets for (the) concert A B C D Question 2:I (had to drive) to (the) factory (to pick up) my brother, (who's) car wouldn't start A B C D Question 3:I (wish) I (can go with you) (to the countryside) (next weekend) A B C D Question 4:If there (will be) too much (exhaust fume) in (the air), our breathing will be (badly effected) A B C D Question 5: (Either) my mother nor my father (wants) me (to be) an (engineer) A B C D

1. asset (n): tài sản 2. reflect (v): phản chiếu 3. amend (v): sửa đổi 4. dedicate (v): cống hiến 5. enable (v): kích hoạt 6. consider (v): xem xét 7. aspire (n): khao khát 8. deter (v): ngăn cản 9. expedition (n): cuộc thám hiểm 10. generate (v): tạo ra 11. bombard (v): bắn phá 12. deal (n): thoả thuận 13. approach (v): tiếp cận 14. redundant (n): dư thừa 15. fulfil (v): hoàn thành 16. ambition (n): tham vọng 17. intrigue (a): tính gây tò mò 18. disposable (a): có thể phân huỷ 19. purchase (v): chi trả 20. prompt (v): khiến Tìm 1 từ đồng nghĩa với 20 từ trên

Tầng ozon có chứa gì? Viết phương trình ion gây lủng tầng ozon Nếu trái đất không còn tầng ozon sẽ ra sao? Bức xạ mặt trời có thể giết chúng ta không?

1. She doesn’t live in London because she doesn’t know anyone there → She’d ………………………………………………………………. 2. I can’t live in the country because I can’t find a job there → I’d ……………………………………………………………….. 3. I don’t have a spare ticket. I can’t take you to the concert → If I ………………………………………………………………... 4. The schoolchildren sowed some seeds, but they forgot to water them so they didn’t grow. → If the children ……………………………………………………….. 5. They don’t understand the problem. They won’t find a solution → If they ………………………………………………………… Câu điều kiên

1. Riding a bicycle along the pavement is against the law. You . 2. They declared war on the pretext of defending their territorial rights. The excuse for . 3. They stretched the rope from one side of the crevasse to the other in order to haul their equipment across. By stretching . 4. This scheme is too risky for my liking. The risks . 5. You can try to get Jim to lend you his car, but you won't succeed. There is no point . 6. He knows nearly everything about whales. There is . 7. Simon hadn't expected that he would feel so weak after the operation. The operation left . 8. You can't park here. It's a restricted area. No . 9. Failing prompt payment, the goods must be returned by you. You must either . 10. Collecting stamps gives me a lot of pleasure. I derive . 11. You haven‘t explained exactly how the money disappeared. You haven‘t accounted . 12. Only an unforeseen problem can stop the scheme now. Nothing . 13. I won't be able to hear you if you don't speak up. If youwant . 14. Apart from Philip, everyone else at the meeting was a party member. With . 15. No tuition fees are payable in any publicly-maintained school. Publicly-maintained school do . 16. Can I speak to someone about my problem? Would it be ? 17. Mrs Wilson says she is sorry she didn't attend the meeting yesterday morning. Mrs Wilson sends . 18. If you want accommodation in Brighton, you should book in advance. If you want accommodation in Brighton, it . 19. Only a few minutes remained when the winning goal was scored. There wasn't . 20. I was surprised when Mary got into university, given the fact that she hadn't worked hard at school. To my ………………………………………………………………………