Cho hình bình hành ABCD.Lấy M tùy ý trên AB. Kéo dài DM cắt BC tại N, cắt AC tại K a/cm: tam giác AKD đồng dạng với tam giác CKN và KA.KN=KC.KD b/cm:DA.DN=NC.DM

I learn ...to read and wirte dủing english lesson. A,but b.to c.on d.and

Bạn nào giúp mình câu a và b vs

Làm thế nào để con ngựa kéo được thuyền di chuyển trên sông mà không bị vào bờ??( Chỉ dùng 1 con ngựa, 1 dây thừng)

tài nguyên thiên nhiên là gì ? cho 2 ví dụ

làm giúp mình phần mở bài của bài thơ nói với con của y phương tích hợp với bài thơ khúc hát ru những e bé lớn trên lưng mẹ với ạ

a) Cho a ≥0 và b<0. Rút gọn biểu thức: P = √a ² - √b ² b) Thực hiện phép tính ( √12 + √75 ) √3 giải dùm mình nhe, mình cảm ơn

1. Conservation also includes searching_________ alternative fuels, such as the energy of the Sun. 2. These days everybody is aware___________ the dangers of smoking. 3. Clean air provides us__________ a healthy supply of oxygen. 4. When wastes are poured _________ the atmosphere, the air becomes contaminated and unpleasant to breathe. 5. Some large cities may have to ban cars_________ the city centre to wipe _________ smoke. 6. The fight___________ pollution of our environment is important as well. 7. People used to believe that the world’s natural resources could never be used__________. 8. Conservation is also concerned_________ the reclaiming of land. 9. Protect your child_________ direct sunlight by using a sunscreen. 10. Vehicles account________ air pollution in the city.

REWRITE THE SENTENCES WITHOUT CHANGING THEIR MEANING 1. this is the first time i have ever met such a pretty girl -> she is .... 2. he works much. he feel tired. -> the more .... 3. the apartment is big. the rent is hight. -> the bigger.. 4. we set off soon . we will arrive soon -> the sooner.. 5. the joke is good. the laughter is loud -> the better.. 6. she gets fat. she feels tired -> the fatter.. 7. as he gets older, he wants to travel less -> the older.. 8. the children are excited with the difficult games -> the more.. 9. people dive fast. many accidents happen -> the faster... 10. i meet him much. i hate him much -> the more ... 11. my boss works better when he is pressed for time -> the less.. 12. as he has much money, he wants to spend much -> the more... 13. if you read many books , you will have much knowledge -> the more ... 14. he speaks too much and people feel bored -> the more.. 15. the growth in the economy makes people's living condition better -> the more... 16.people learn a lot of things as they travel far -> the farther.. GIÚP MIK VỚI , NHỚ PHẢI ĐÚNG NHÉ. VOTE 5 SAO

Lớp 1B có 45 bạn, lớp 1C có 50 bạn. Hỏi cả hai lớp có tất cả bao nhiêu bạn?