Cho tam giác ABC . Gọi I,J,K là trung điểm của AB,AC,BC .CMR : a) IJ -JC = KJ b) IJ+KJ+KI=BA

Giúp mik với mik đang cần gấp lắm 🥺🥺🥺

cho tam giác abc vuông tại a ( ab>ac), đường cao ah. gọi m là trung điểm của ab,ad là phân giác bah ( d thuộc bh), md cắt ah tại e. chứng minh ce//ad

Viết lời Phàm Lệ về cuốn sách Vũ Trụ Trong Một Nguyên Tử. Sao chép = Báo cáo

Cho AOB = 50o, tia OC tia phân giác của góc. Gọi OD là tia đối của tia OC. Trên nửa mặt phẳng bờCD chứa tia OA, vẽ tia OE sao cho DOE = 25o. Tìm góc đối đỉnh với góc DOE \và giải thích tại sao.

nêu cảm nhận của em về tình cảm của bác dành cho thiếu nhi việt nam và quốc tế

(12x-1)(6x-1)(4x-1)(3x-1)-330 phân tích đa tử thành nhâ tử

Đề bài: supply the correct verb forms

Hãy viết tất cả tập hợp con của tập hợp sau: A={1;2;3;4}

UNIT 2: LIFE IN THE COUNTRYSIDEen D. watch B. MULTIPLE CHOICE I. Choose the best answer to complete each of the following sentences. 1. It is ....................... in the city than it is in the country. A. noisily B. more noisier C. noisier D. noisy 2. The English test was ....................... than I thought it would be. A. the easier B. more easy C. easiest D. easier 3. English is thought to be ....................... than Math. A. harder B. the more hard C. hardest D. the hardest 4. My house is ....................... hers. A. cheap than B. cheaper C. more cheap than D. cheaper than 5. Her office is ....................... away than mine. A. father B. more far C. farther D. farer 6. Tom is ....................... than David. A. handsome B. the more handsome C. more handsome D. the most handsome 7. He did the test ....................... I did. A. as bad as B. badder than C. more badly than D. worse than 8. A boat is ....................... than a plane. A. slower B. slowest C. more slow D. more slower 9. My new sofa is ....................... than the old one. A. more comfortable B. comfortably C. more comfortabler D. comfortable 10. My sister dances ....................... than me. A. gooder B. weller C. better D. more good 11. This road is ....................... than that road. A. narrower B. narrow C. the most narrow D. more narrower 12. He drives ....................... his brother. A. more careful than B. more carefully C. more carefully than D. as careful as 13. It was ....................... day of the year. A. the colder B. the coldest C. coldest D. colder 14. She is ....................... student in my class. A. most hard-working B. more hard-working C. the most hard-working D. as hard-working 15. Jupiter is ....................... planet in the solar system. A. the biggest B. the bigger C. bigger D. biggest 16. Yoga help us learn ................ to co-ordinate breathing and movement. A. what B. when C. why D. how 17. Teenagers enjoy................to music and ................ out with friends. A. listen - hang B. to listen – to hang C. listening - hang D. listening - hanging 18. ................should children do yoga too? A. Why B. When C. What D. How 19. Don’t worry. It is to travel to that village even at night. A. safe B. unsafe C. difficult D. inconvenient 20. Life in a small town is ................ than that in a big city. A. peaceful B. much peaceful C. less peaceful D. much more peaceful C. WORD FORMS I. Give the correct form of the word given to complete the sentence. 1. Iceland is considered the most country in the world. (PEACE) 2. A lifestyle has its advantages and disadvantages. (NOMAD) 3.My brother has been a stamp for several years. (COLLECT) 4.It is a/ an place to hold a picnic because it is too far from the road. (CONVENIENCE) 5.Drinking water in some areas may be . (SAFE) D. VERB FORMS I. Write the correct form of verbs in the bracket. 1. It (be) often hot in summer. 2. The children often go (swim) in rivers after school. 3. It is necessary (water) the flowers twice a day. 4. Farmers are always busy with (harvest) their crops. 5. Mai (love) (listen) to the morning sounds in the countryside. 6. My father always (make) important decisions in my family. 7. In summer afternoons, children often (fly) kites especially when it (be) windy. 8. We sometimes (gather) around the campfire and (listen) to the elderly tell stories about my village's heroes. F. CORRECTION I. Find ONE mistake in each of the following sentences and correct it. 1. Farzana did poor on her algebra quiz because she couldn’t concentrate well. A B C D 2. The test was more difficult than I expected. I could finish it at least 20 minutes early. A B C D 3. Although the island has no clean water and electric, it attracts lots of tourists. A B C D 4. The bee can easy sting anyone coming close to their beehives. A B C D 5. I love farm work, such as digging holes, sowing seeds and I pick fruit. A B C D 6. She is boring with the silent surrounding because she used to live in a big city. A B C D 7. Life in the countryside is much peaceful and the life is also slower. A B C D 8. Nomadic children learn riding a horse when they are very small. A B C D 9. After a few weeks of lessons I could dance gracefully than before. A B C D 10. Steve works more happy than he used to. A B C D