∆ADB =>DB =√(AB^2+AD^2)=√36+16)=2√(9+4)=2√13AO.DB=AD.AB=4.6AO=4.6/2√13=12/√13∆AOD=>DO=√(AD^2-AO^2)=4√(1-3^2/13)=8/√13OB=DO-DO=2√13-8/√13=18/√13AB/DC=OB/OD=18/8=9/4DC=6.4/9=8/3OC/OA=DC/AB=4/9OC=12/√13.4/9=16/(3√13)BC^2=OC^2+OB^2=18^2/13+16^2/(9.13)=4.61/9BC=2√61/3
Vẽ cách trang trí và tạo dáng của quạt giấy rồi gửi sản phẩm cho mk Ây ai chép mạng là chết với mk BC và bão 1 sao un đó NL nhóm nào tuyển thành viên thì nói mk 1 câu nha
Lan đi chợ mua 2kg táo và 2kg ổi hết 110000 đồng biết 3kg táo mắc hơn 2kg ổi là 750000 đồng .tính giá tiền mỗi kg táo giá tiền mỗi kg ổi ? làm nhanh lên chậm quá
200ml dung dịch HCl có nồng độ 3,5mol/lít hoà tan đủ 20g hỗn hợp CuO và Fe2O3. Tính khối lượng của mỗi oxit trong hỗn hợp ban đầu
Exercise 1. Mark the letter A, B, C, or D to indicate the word that differs pronunciation Q2: A. now B. how C. blow D. amount * 4 điểm D B C A
Nhà phát kiến địa lý nào đã tìm ra đất nước Ấn Độ? Vì sao đất nước Ấn Độ bị rơi vào ách thống trị của thực dân?
TẠI SAO TRONG TN NC CHẢY TỪ TRÊN XUỐNG MÀ TRONG CÂY NƯỚC ĐI NGƯỢC TỪ DƯỚI LÊN TRÊN
dạ bài này giải sao ạ (trình bày rõ ràng) ?
Giups mình với, gấp ạ, rất gấp mọi người làm chính xác giúp mình. điểm cũng cao ạ
Mng giúp mình vt 1 đoạn văn tiếng anh về bất đồng ngôn ngữ do khoảng cách thế hệ với
Put in the correct preposition: 1- I was delighted ................... the present you gave me. 2- It was very nice .................. you to do my shopping. 3- Why are you rude .................. your sisters? Can’t you be nice ............... them? 4- Were you disappointed ................ your exam results? 5- We always have the same food every day. I’m fed up ................ it. 6- I can’t understand the people who are cruel ............... animals. 7- Are you angry .................. what happened? 8- I’m sorry .............. what that I said. I hope you’re not angry ............. me. 9- Linda doesn’t look very well. I’m worried ................. her. 10- It was a bit careless ............... you to leave the door unlocked. 11- It is good .................. you to be so helpful. 12- The people next door are furious .............. us ............ making so much noise last night. 13- Are you excited .......... going on holiday next week? 14- I was shocked .............. what I saw. 15- We weren’t very impressed ................. his appearance. 16- Are you still upset ................ what I said to you? 17- I felt sorry ................ the children when we went .......... holiday. 18- His letter was full ........... mistakes. 19- The Italian city of Florence is famous ............ its art treasures 20- Kate is very fond ............. her younger brother. 21- Are you afraid ............. snakes. –Yes, I’m terrified ............. them. 22- You don’t seem interested ................ what I’m saying. 23- Did you know that Liz is engaged .............. a friend of mine? 24- I’m not ashamed ................ what I did. In fact I’m quite proud ............. it. 25- I suggested we should all go out for a meal but nobody else was keen ............ the idea. 26- These days everybody is awere ................ the dangers of smoking. 27- The station was crowded ............... people waiting for the train. 28- Why are you always so jealous ................. other people? 29- I’m tired ............ doing the same thing every day. 30- Her children have all been successful ............. their chosen careers. 31- I’m a bit short ............... money. Can you lend me some? 32- I’m not very good ............. repairing things. 33- The film is different ................. what I’d expected. 34- I’m sure you are capable ................. passing the exam. 35- Who was responsible ................ all that noise last night? 36- Our house is similar ................. your. Perhaps yours is a bit larger. 37- She’s totally dependent ................ her parents. 38- The fungus is not harmful ................ humans. Smoking is harmful ............. your health. 39- Many young people want to be independent ................. their parents nowadays. 40- I’m very grateful ............ her ................ her help. 41- He didn’t trust me. He was suspicious .................. my intentions. 42- The meeting will begin ................. 8.30 sharp. 43- I didn’t know that the man told us a lie ..................... yesterday. 44- A strange noise woke me up ............... midnight. 45- A man was sitting ................ the roof of the house and laughing. 46- Their head office is ....................... the eleventh floor of an eighteen-storey building.
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