user-avatar
truongcamtu02
2 năm trước
cho tam giác ABC cân tại A và có B=2A .phân giác của góc B cắt Ac tại D a)tính các góc tam giác ABC b)chứng minh DA=DB c)c/m:DA=BC GIÚP MÌNH LM BÀI NÀY NHÉ MÌNH CẦN GASP NÊU RÕ CÁCH CHỨNG MINH NHÉ
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

03.Christmas Eve is _____ best time for Japanese youngsters to go out for _____ special, romantic evening. A.the-aB.a-aC.the-theD.a-the 04.This is _____ wedding party I've ever attended .A.more memorableB.the more memorableC.most memorable D.the most memorable 05.At the church ceremony, the couple have to make their wedding _____. A.invitationsB.flowersC.vowsD.cakes 06.On many days of the year, Vietnamese people not only _____ the table for meals, but they also put food on the altar for their ancestors .A.layB.clearC.lieD.book 07.Whenever I set out for _____ examination, I always try to avoid crossing _____ path of _____ woman. A.an-the-aB.the-the-aC.an-the-theD.an-a-the 08.On the wedding day, the best man is expected to help the _____. A.brideB.groomC.bridesmaidD.guest 09.Viet Nam is a country situated in Asia, where many mysteries and legends _____. A.originallyB.originC.originalD.originate 10.Wedding ceremonies are _____ now than they used to be in the past. A.as complicatedB.the most complicatedC.the least complicatedD.less complicated 11.In Viet Nam, you shouldn't _____ at somebody's house on the 1st day of the New Year unless you have been invited by the house owner. A.get upB.put upC.go upD.show up 12.People in _____ Western countries are often surprised to learn that _____ Japanese celebrate Christmas. A.-theB.the-theC.the-D.-the 13.After the wedding ceremony at the church, they go to the hotel for the wedding _____. A.cakeB.ringC.receptionD.day 14.People in Mexico _____ Mother's Day on May 10 by giving their mothers handmade gifts, flowers, lothing and household appliances. A.memorizeB.openC.performD.celebrate 15.In Japan, _____ most important holiday of _____ seasonis New Year's Day, which comes one week after Christmas. A.the-B.the-aC.-theD.the-the 16.The newly-weds will fly to Venice to spend their _____ tomorrow. A.marrigeB.vacationC.honey moonD.holiday 17.In the past, the _____ and engagement ceremonies took place one or two years before the wedding. A.proposingB.proposalC.proposeD.proposed 18.The Korean are _____ than the American in addressing their bosses. A.much formalB.most formalC.the most formalD.more formal 19.In a wedding ceremony, _____ best man helps ____groom ready for every preparation. A.a-theB.the-theC.a-aD.the-a 20.English people believe that it is unlucky to open an umbrella in the house, which will bring _____ to the person who has opened it. A.lossB.truthC.misfortuneD.success

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team