Cho ∆ABC có AB=AC và BC<AB, gọi M là trung điểm của BC. a)Chứng minh:∆ABM=∆ACM và AM là tia phân giác của góc BAC b) Trên cạnh AB lấy điểm D sao cho CB =CD. Kẻ tia phân giác của góc BCD, tia này cắt cạnh BD tại N. Chứng minh:CN vuông góc với BD c) Trên tia đối tia CA lấy điểm E sao cho AD =CE . Chứng minh :BE-CE=2BN Nhớ vẽ hình, ko được spam mình sẽ vote 5

Viết đoạn văn nói về vai trò của môi trường và thiên nhiên

Làm hộ mik B3 nhé ( câu điều kiện)

Trong mặt phẳng Oxy đường tròn (c) có pt x^2+y^2+2x-4y-20=0 M(3,0). Viết phương trình đường thẳng d qua M và cắt (c) tại hai điểm phân biệt A B sao cho AB có độ dài bé nhất

Trường hợp không xảy ra phản ứng hóa học là : A. 3O2 + 2H2S -> 2H2O + 2SO2 B. FeCl2 + H2S → FeS + 2HCl C. O3 + 2KI + H2O → 2KOH + I2 + O2 D. Cl2 + 2NaOH → NaCl + NaClO + H2O

the policeman kept me for an hour (passive voice) ->............................................................................

Giúp mik với đang cần gấp lắm lắm (hứa vote 5 sao) xin hãy giúp mik đi 😭

Ngọn núi A có độ cao tương đối là 1500m, người ta đo chỗ thấp nhất của chân núi đến mực nước biển trung bình là 210m. Vậy độ cao tuyệt đối của ngọn núi này là bao nhiêu?

ex1.supply the correct tense of the verbs in brackets 1.Mary and John(be).....neighbors.They(know).....each other for a long time.Mary(move).....into her house in 1990,and John(live)next door since he(come).....to the area in 1988 2.Today(be).....Sunday.Nga(not go).....to school.She(start).....at home.She(do).....her homework now.She(do).....it for two hours. 3.i(be).....in New York.i(come).....here two years ago.My friend,Nancy(live).....here since 1982.So she(know).....the area very well. 4.Trung usually(go).....to the library three times a week. 5.Yesterday I (be).....busy,so I (not have).....time to phone you. 6.Mrs.Trang(not go).....-to work last week.She(not be).....feeling well. 7.I (do).....all the housework.The flat is really clean now. 8.How long you (live).....here?-Since 1997. 9.Mr.Quang (teach).....in this school since he(graduate).....from the university in 1989. 10.My brother(leave).....home 10 years ago.I (never meet).....him since then. 11.Where you (spend).....your summer holiday last year,Tam? 12.When we (be).....young,our family(live).....in the countryside. 13.I (read).....an interesting book at the moment. 14.how long you(know).....Mrs.Chi?-I(know).....her for five years 15.We(not see).....her since we(be).....on holiday in Ha Long Bay. 16.Phuong(finish).....her homework tonight. 17.it's three years since I last(see).....Nam 18.You(be).....away?-Yes.I(go).....to the country last Sunday. 19.I(not eat).....anything for two days 20.They(move).....to Ho Chi Minh city in 1990 and(live).....there since then. ex2.choose the word which has the underlined part pronounced differently from the others. 1. A.school B.chair C.chemistry D.character 2. A.serious B.symptom C.sugar D.sauce 3. A.order B.novel C.portable D.score 4. A.coop B.cartoon C.stool D.indoors ex3.choose the word that has different stress from others 1. A.complete B.detective C.gather D.event 2. A.mixture B.allow C.affect D.disease 3. A.exit B.cushion C.turtle D.improve 4. A.museum B.useful C.cavity D.wedding

viết thư phản hồi Note: You need to write a response toan email that you will read. What your response needs to include is in the directions so make sure you also read the directions carefully. Dear George, You were so kind and a godsend to look after me after I was involved in an accident last Monday. I am writing to express my immeasurable admiration for your altruistic and brave action. I am Simon Annand, a math teacher at the Cherry Blossom high school, and I live with my family at 24 Abbey Rise Street, London. On my way to the school at around 8.30 am last Monday, my motorbike crashed with a private car near Aberdeen Drive and I lost control. I was severely injured and could not move or pick up my bike. If you had not decided to help me, the situation could have been worse. I am so grateful to you for your kind help and generous words. You even took the burden to take me to a nearby hospital and that was so noble of you. I cannot express enough how thankful I am to you. When my parents and wife heard about how courageously you assisted me, they prayed for you even though they have never met you before. I regret that I could not thank you enough. Please accept my invitation to visit our home at your convenience and allow my family to thank you properly. I have recovered quickly and the thanks go to you. Please visit us with your family and let our brief encounter becomes an opportunity to know you more. Yours truly, Simon