Cho 2 đtròn ( O;R) và (O';R') tiếp xúc ngoài tại B .Đường thẳng OO' cắt (O) tại A và cắt (O') tại C .Gọi MN là tiếp tuyến chung ngoài 2 đtròn (M thuộc (O) ; N thuộc (O') ) a) CM: ^MBN = 90* b) CM : KM.KA = KN.KC c) AM cắt CN tại K .CM tứ giác BMKN là hcn d) Gọi I là trung điểm của AC . CM MN vg góc với KI

thách mấy pác vẽ avatar siêu cute của tui nhường mấy pác vẽ đẹp:))))

cho tam giác abc cân tại A, điểm M thuộc cạnh BC.kẻ MD vuông góc AB,ME vuông góc với AC,BH vuông góc với AC.chứng minh MD+ME=BH

Bài 1 : Tìm x a) 210 - 5x = 200 b) 210 - 5.(x - 10) = 200 c) 450 : [41-(2x-5)]= 3 ² . 5 d) 210 : x - 10 = 20 e) (2x + 1) : 7 = `2^2` + `3^2` f) (5x - 39) . 7 + 3 = 80 g) 100 - 7 . (x - 5) = 58 h) 12 . (x - 1) : 3 = `4^3` + `2^3` i) 24 + 5x = `7^5` : `7^3` k) 5 .(x - 1) - 206 = `2^4` . 4 nhanh giúp mk với , help me !!!

Viết thư UPU lần thứ 50 Chủ đề: Em hãy viết thư cho một người thân trong gia đình để chia sẻ trải nghiệm của mình về đại dịch COVID-19 Hình thức: viết thư gửi cho một người thân trong gia đình Nội dung: Chia sẻ trải nghiệm của bản thân về đại dịch COVID-19 [KO CHÉP MẠNG]

vì sao nhà Trần chỉ chọn trai tráng ở họ Trần

Đặt câu hỏi cho từ gạch chân 1. They must help her clean the floor.( the floor) 2. The new film is on VTV3. (VTV3) 3. You mustn't talk during the lessons. ( talk ) 4. Miss Lan is working as a volunteer teacher in a village in Hoa Binh.

Đoc đoạn văn về nhạc sĩ mary và trả lời câu hỏi

4. Look carefully at each line. Some of the lines are correct, and some a word which should not be there. Tick each correct line. If a line has word which should not be there, write the word in the space. SPORTS DAY Every year, our school holds a Sports Day. Everybody looks forward to it because it is a lots of fun. We do not have lessons and we spend the whole the day competing in athletics events. My favourite event is the high jump, which I nearly always win. This year I hope that to be able to take part in the shot put as well.1 think it is about time I had learned a new sport. I like the shot put because you have to have both speed and strength to throw it a far long way. Of course, I will have to practice quite hard to beat everyone else so I go for training at my school athletics club three times a week. My teacher says 9. he would rather I have trained more often but I don't have any time. Sports Day is on Friday and my parents will be being there to watch me. I hope I manage to win! 0. 0. 1. 2. 3. ****** 4. 5. 6. 7. 8. 10. 11. 12. 5. Use the word given in capitals at the end of each line to form a word that fits in the space in the same line. SCHOOL REPORT Margaret started English Literature this term, and I am afraid that her (1) introduction to the subject has not been entirely (2), and does not always pay (3). ments are often (4) because of her (5) She failed to do any (6) and had poor results. She seems to have the (7) idea that she can succeed without studying. She has also had many (8) class. This has resulted in several (9) Although Margaret is a (10), has not had a satisfactory term. INTRODUCE She has not shown much enthusiasm, in class. Her assign- because she is so untidy, and to check her work thoroughly. before the end of term test, SUCCESS ATTEND READ FAIL REVISE MISTAKE and has frequently arrived late for ABSENT PUNISH student in some respects, she GIFT Complate the taxt using "double" comparative (e.g. better and better

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