Trên đường tròn (O) lấy 3 điểm A, B, C. Gọi M, N và P theo thứ tự là điểm chính giữa của các cung AB, BC và AC. Kẻ BP cắt AN tại I, NM cắt AB tại E. Gọi D là giao điểm của AN và BC. Chứng minh: EI//BC

Cho tam giác ABC có AB < AC. Qua trung điểm K của BC vẽ đường thẳng d vuông góc với tia phân giác của góc A, d cắt AB, AC lần lượt tại H, I. a) Chứng minh rằng: BH = CI b) Chứng minh rằng: góc KAB> góc KAC c) Nếu góc A vuông, gọi M, N lần lượt là trung điểm của AB, AC. Cmr: BN^2 + CM^2 = 5/4 * BC^2 d) Lấy điểm P thay đổi trên AB, điểm Q thay đổi trên AC sao cho BP = CQ. Chứng minh rằng: Đường thẳng đi qua trung điểm và vuông góc với PQ luôn đi qua một điểm cố định.

Bài 1:Cho tam giác ABC vuông tại A,ACB=30⁰.Kể AH vuông góc với BC tại H(H thuộc BC).Trên đoạn HC lấy điểm Đ sao cho HD=HB a)CM:AB=AD b)CM:DA=DB=DC c)Từ C kẻ CE vuông góc với AD tại E.Chứng minh HE song song với AC Làm hộ mik nhaaaaa!!!

Dimonds cố lên nhaaaa, cố gắng nhé, thg 6 tui về Chúc mn năm mới vui vẻ Vẽ anime cầm pháo

Vẽ pic dưới. Ngoài lề: Team đc lì xì toàn tờ 10k+20k đâu rồi. Ít tiền lì xì hôm nay nữa. ;-; Mà ai ở nông thôn như tôi ko? Ko đc ra ngoại vì xa+ở đó có covid nữa? Yêu cầu: vẽ đẹp, ko xấu, ko vẽ vở ô li, tradi, ko chụp bằng máy tính, ô chụp mờ. Vẽ bằng bút bi xanh.

Question 1. Choose the word that has the underlined part pronounced differently from the others. (1pt) 1. A. head B. please C. heavy D. measure 2. A. photo B. hold C. fork D. slow 3. A. lucky B. punish C. hungry D. pull 4. A. fly B. hungry C. body D. heavy 5. A. child B. live C. practice D. will Question 2. Put the correct tense of the verbs in sentences below. (1pt) 1. Lan is in grade 6 and she (learn) ____________________ at Nguyen Du school now. 2. Tony (wait) __________________ for me when I arrived. 3. My father ( buy) ______________________ this house for three years. 4. It’s raining. Don’t go out. You (be)______________ wet. 5. My little brother (not go) _______________to bed early last night. 6. Look! Our kids (water) ________________ the flowers in the garden . 7. We (pay) ________________ a visit to some nations in the world next summer. 8. Tom (go) ______________ out. He’ll be back in about an hour. 9. If you are lazy, you (not become)_____________ a good student. 10. When he was younger, he (use) ____________ to carry things for other people. Question 3. Underline one mistake in each sentence and write the correct word. (1pt) 1. They prefer staying in the countryside because the fresh air. _______________ 2. Our class room is on the three floor. _______________ 3. I’d like seeing him in my office every morning. _______________ 4. It is difficult to Jack to pass the final exam. _______________ 5. No. There aren’t some stamps left in here. _______________ 6. I have to sends some postcards to my family. _______________ 7. Sorry! Are there a supermarket near here? _______________ 8. He is enough old to join the party . _______________ 9. Dung’s mother wants him stay in bed. _______________ 10. Her son hates to eat fish and chip. _______________ Question 4. Read the passage and use the given words in the box to fill in the blanks. (1pt) popular / events / programs/ important / games / famous / radio /news / sport / play Sports and games play an (1) __________ part in our lives. Everyone of us can (2) _______ a sport, or a game, or watch sports (3) ___________on TV or at the stadium. When you listen to the (4) ___________early in the morning, you can always hear sports (5) _________. When you open a newspaper, you will always find information about some (6) ____________, or an article about your favorite kind of sport. Television (7) ___________ about sport are also very (8) _____________, and you can watch something interesting nearly every day. Stories about (9) ___________ men and women in the world of (10) __________ are often very interesting. Question 5. Read the passage and choose the best answer for each question below. (1pt) Who are the best drivers? Which drivers are the safest on the road? According to a recent survey young and inexperienced drivers are the most likely to have an accident. Older drivers are more careful. Young men have the worst accident records or all. They often choose faster cars with bigger engines. One of the most interesting facts in survey is that passengers have an effect on the driver. When young male drivers have their friends in the cars, their driving becomes worse. When there wife of girlfriend is in the car, however, their driving is better. But opposite is true for women. Their driving is more dangerous when their husband or boyfriend is in the car. 1. According to the survey, who are the most likely to have an accident? A. Young and experienced driver. B. Old and inexperienced drivers. C. Young and old drivers. D. Young and inexperienced drivers. 2. Young men often choose ____________________________. A. expensive cars. B. fast cars with big engines. C. slow cars with big engines. D. fast cars with small engines. 3. Who have an effect on the driver? A. passengers. B. policemen. C. children. D. journalists. 4. When young male drivers have their wife of girlfriend in the car, their driving becomes ________________. A. worse. B. better. C. slower. D. faster. 5. The worst accidents are often taken by ___________________. A. Male drivers. B. Female drivers. C. Young men. D. Young women. Question 6. Rewrite the following sentences that keep the same meaning. (1pt) 1. He wrote the letter in two hours. It took ........................................................................................................ 2. He is the tallest player in his team. No one …………………………………………………………………. 3. How much does the shirt cost? What is……………………………………………………………………? 4. Dancing is one of my interests. I’m ……………………………………………………………………… 5. Why don’t we travel to Paris? How …………………………………………………………………….? Question 7: Write a paragraph about 180 words describing your present school. (1pt)

trên 1 máy bơm nước có ghi 1849W a, giải thích ý nghĩa b, nếu hoạt động hết công suất thì sau 30 phút máy bơm được ? lít nc lên cao 4,5m. Biết hiệu suất của máy bơm là 85%, khối lượng riêng nươc là 1000 kg/m^3 c, Tính lưu lượng dong nước

Vẽ anime cầm lì xì nha Ngoài lề : Hum nay m.n đc lì xì bn tiền ._.

vẽ anime khóc a :)) nhanh nha <33

Word form: 1. This is a(n)_______thriller that promises to deliver 2. Death, from this perspective, seem unproblematically universal, a simple, irreducible fact of our nature,_______the same across all societies and throughout time (yield) 3. Of course there is a(n)_________between such advantages of large cells and the disadvantages of slower cell multiplication. (trade) 4. Today we look at claims that in Queensland, the regime that looks after the most vulnerable people, the infirm elderly, and__________adults, is failing. (capacity) 5. Scholars have tried to make a case for___________,competitiveness, and selfishness as innate human trait. (acquire) 6. The judge ruled that Newman's comments were not a(n)____________offense.(act) 7. She was a very selfish,___________bad-tempered little girl. (agree) 8. Before creating this sculpture, she studied all the masterpieces of classical_________(antique) 9. He claims that the laws are and____________have no contemporary relevance.(antique)