Cho góc xOy nhọn và tia phân giác Oz của góc đó. Trên tia Ox lấy điểm A, trên tia Oy lấy điểm B sao cho OA=OB. Từ A kẻ đường thẳng song song với Oy cắt Oz tại C. C/m
a) Tam giác OAC=OBC
b) OC vuông goc vs AB
c) AO=BC
Các bn làm nhanh giúp mk vs, mk dgd cần gấp lắm ( vẽ hình nx nha)
Cho góc xOy khác góc bẹt. Vẽ tia phân giác Oz của góc xOy. Trên tia oz lấy điểm A( khác O) từ điểm A vẽ các đường thẳng lần lượt vuông góc với Ox và Oy tại B và C
a) C/m: Tam giác ABO= TG ACO
b) Gọi I là giao điểm của BC và Oz chứng minh IB=IC
c) Cho góc xOy= 120 độ. Tính số đo góc ABI
1. .................. is a story passes on in spoken form from one generation to the next ( Novel/ fiction/ Folktale/ Legend)
2. We should meet her .................. 9.30 and 10.15
3. Ask her (telephone) ................ me after lunch
4. This is a handmade hat. People use straw and hay .......... it ( make/made/to make/making)
5. There is no use .............. a buffalo right from wrong ( to teach/ teaching/ to teaching/ teach)
6. Huyen anh Nhi used to be a ..........tiger in Viet Nam ( love/ belove/ beloved/ loved)
7. They then got married and lived ........... ( happy/ happily/ unhappy/ unhappily)
8. I still ............ one of them ( remembered/ remembering/ remember/ to remember)
9. I tried (remember) ................... their names but I couldn't
10. I used to look forward ......... to folk songs from my mother. ( to listening/ with listen/ to listen/ with listening)
11. ............... Chrismast. There are a llot of decorations around the houses
12. I like folk tale and ............ does my sister
13. I'll wait ten minutes for you .............. you are late ( in case/ in order/ in fact/ in general)
14. I'll call in on my parents on my.......... to the festival ( road/way/route/path)
15. foolish/some money./ It was/ give him/ to ( sắp xếp)
16. Hoa and I/ at last./ went to/ the meeting/ the night ( sắp xếp)
Giúp mk nhanh nhé, mk đg cần gấp lắm
I ( understand) ............... Portuguese becasue I have lived in Brazil for ten years
2, Young children do not understand that many ............... objects are dangerous
3. ..................... the short holiday, the children had a chance to visit their grandparents in the countryside ( During/ at/ on/ In)
4. Your order is ready for .............. ( delivery/ deliver/ delivered/ deliverable)
5. My.............. will call you later ( assisting/ assistant/ assist/ assisted)
6. His ........... to London was welcomed by his entire neighborhood * move/ moved/ moves/ moving)
7. Only a few of the children were brave enough ......... come closer
8. That antique table............. belong to my great gandpa ( was/ did/ use to/ used to)
Giúp mk nhanh, mk cần gấp