Xét $ΔCAD$ và $ΔCBD$ ta có:
$AB$ là cạnh chung.
$AD$= $AC$ ( $gt$ )
$BC$= $BD$ ( $gt$ )
⇔ $ΔCAD$ = $ΔCBD$ ( $c . c .c$ )
Vậy $\widehat{CAD}$=$\widehat{CBD}$
Mọi người giúp em với ạ Em cần gấp ạ
Trong vai 1 hướng dẫn viên du lịch , em hãy giới thiệu 1 quốc gia ở Đông Nam á ( giới thiệu thật lôi cuốn , thu hút khách du lịch cũng phải đầy đủ ý nhớ là thật lôi cuốn , thu hút , đầy đủ ý )
Choose the best answer among A, B, C or D to complete each sentence. 1. I want…………football. I hope …………..to play for the MU. A. to play/ to be chose B. to play/ to choose C. playing/ be chosen D. to play/ being chosen 2. I don't understand why the students didn't keep silent while the speech ............ A. has been made B. was made C. would be made D. was being made 3. This is the first time I have seen this car. Where ..................? A. did it make B. did it made C. was it make D. was it made 4. Today, many serious childhood diseases .................... by early immunization. A. are preventing B. can prevent C. prevent D. can be prevented 5. Whole-grain food products ……….. in most large supermarkets across the United States and Canada. A. now can purchase B. can now be purchased C. now to purchase D. the purchase of which 6. All that rubbish will have to be ............. at once. A. get rid of B. got rid of C. got rid D. getting rid of 7. "What happened to the postman?" "He ...................... to a new town to work." A. has sent B. was send C. was sent D. sent 8. Excuse me. Is this seat..................? A. taking B. took C. occupy D. taken 9. There’s somebody walking behind us. I think ................... . A. we are following B. we are being followed C. we are followed D. we are being following 10. We’re late. The film .................. by the time we get to the cinema. A. will already start B. will be already started C. will already have started D. will be starting 11. I still can not believe it. My bicycle .................. some minutes ago. A. was stolen B. was stealing C. stolen D. stole 12. Some funny situations .................. in class yesterday. A. happened B. was happened C. happens D. is happened 13. The child’s arm was swollen because he .................. by a bee. A. stung B. had stung C. had been stung D. had being stung 14. I .................. with you on that subject. A. am agree B. am agreed C. agreeing D. agree 15. Many U.S automobiles .................. in Detroit, Michigan. A. manufacture B. have manufactured C. are manufactured D. are manufacturing 16. When I came, an experiment .................. in the lab. A. was being holding B. has been held C. was being held D. has held 17. George is .................. Lisa. A. marry with B. marry to C. married with D. married to 18. Last night a tornado swept through Rockvill. It ............. everything in its path. A. destroyed B. was destroyed C. was being destroyed D. had been destroyed 19. Dynamite ................... by Alfred Bernard Nobel. A. have been invented B. invented C. was invented D. was being invented 20. .................. this work .................. before you went to Moscow? A. Will/ have been done B. Has/ been done C. Will/ be done D. Had/ been done
Vũ Nương bị nghi oan vì cái bóng và được minh oan cũng nhờ cái bong.Theo em chi tiết này có phải là tình tiết trung tâm của câu chuyện không ? Vì sao ?
Mn ơi giải giúp em bài này gấp vs ạ
vẽ mầm khó hiểu NL quảng cáo ??????
Trong vai 1 hướng dẫn viên du lịch , em hãy giới thiệu 1 quốc gia ở Đông Nam á ( giới thiệu thật lôi cuốn , thu hút khách du lịch )
Hỗn hợp khí X gồm H2 và O2 có tỉ khối so với CH4 là 1,25. 1. Tính khối lượng mỗi khí có trong 11,2 lít hỗn hợp X? 2. Thêm vào 11,2 lít hỗn hợp X a mol khí He thu được hỗn hợp Z có tỉ khối so với H2 là 5. Tính a?
mình mới học sinh 9 Cho mình biết mấy cái như P,G,,F1,F2,k/g F1 ,trội là gì,lặn là gì,3 trội 1 lăn là gì
Program HINH_CHU_NHAT; Uses Crt; Var a,b,s,c: real; Begin Clrscr; Writeln(‘ TINH DIEN TICH & CHU VI HINH CHU NHAT:’); Writeln(‘--------------------------------------------------------------‘); (2) Write('Nhap chieu dai='); readln(a); Write('Nhap chieu rong='); readln(b); s:=a*b; c:=(a+b)*2; Writeln('Dien tich hinh chu nhat la:’,s:6:2); Writeln('Chu vi hinh chu nhat:',c:6:2); (3) Readln; End. Mọi người cho em hỏi là vì sáo đoạn (2) lại viết thêm như thế ạ và có dùng lệnh write thay thế được không ạ? Đoạn (3) vì sao lại có c:6:2 thế ạ?
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