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Cho tam giác ABC cân tại A(góc A bé hơn 90 độ)Kẻ BD vuông góc với AC (D thuộc AC), CE vuông góc AB(E thuộc AB), BD và CE cắt nhau tại H.a.CM: BD=CEb.CM:tam giác BHC cânc.CM:AH là đường trung trực của BCd.Trên tia BD lấy điểm K sao cho D là trung điểm của BK. So sánh: góc ECB và DKC
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Mong mọi người giúp đỡ em ạ (chỉ cần viết đáp án) Điền T or F Christmas is the biggest festival of the year in most Western countries. Celebrations start properly on December 24th, Chritmas Eve, although there have been several weeks of preparations beforehand. The Christmas tree and all the presents, food, drinks and decorations have been bought. About a week before Christmas, the Christmas tree is decorated with electronic lights, various colored decorations and an angel on the top. Family present are usually put under the Chrismas tree. Christmas Day, December 25th, is the biggest day of the holiday. In the Chrismas morning, children open the presents that are in their socks. Many families go to church. The traditional Chrismas dinner consists of roast turkey with potatoes and various other vegetables. 1. Christmas is the smallest fastival of the year in the most Asian countries. 2. On the Chrismas Eve, children open the presents that are in their gloves. 3. Many families go to church on Sundays.

8. I / spend / hours / a day / study English. _________________________________________________________________________ 9. Nam / used / live / a farm / when / he / young. _________________________________________________________________ 10. Angkor Wat / be / known as / wonder / because / it / largest temple / the world. _____________________________________________________________ 11. The glass / send / factories / and / make / into / new glassware. _____________________________________________________________ 12. you / finish / the work / yet ? ______________________________________________________________ 13. While / I / dinner / phone / ring. ___________________________________________________________ 14. She / asked / me / if / I / can / lend / her / some money. _____________________________________________________________

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