,数学,陕西专用,第,12,讲角、相交线和平行线,数学陕西专用第12讲角、相交线和平行线,中考复习专用-角、相交线和平行线课件,中考复习专用-角、相交线和平行线课件,中考复习专用-角、相交线和平行线课件,中考复习专用-角、相交线和平行线课件,1,(,2016,陕西,),如图,,,ABCD,,,AE,平分,CAB,交,CD,于点,E,,,若,C,50,,,则,AED,(,),A,65,B,115,C,125,D,130,2.,(,2014,陕西,),如图,,,ABCD,,,A,45,,,C,28,,,则,AEC,的大小为,(,),A,17,B,62,C,63,D,73,B,D,1(2016陕西)如图,ABCD,AE平分CAB交C,3,(,2013,陕西,),如图,,ABCD,,,CED,90,,,AEC,35,,,则,D,的大小为,(,),A,65,B,55,C,45,D,35,4,(,2015,陕西,),如图,,ABCD,,,直线,EF,分别交直线,AB,,,CD,于点,E,,,F.,若,1,46,30,,,则,2,的度数为,(,),A,43,30,B,53,30,C,133,30,D,153,30,B,C,3(2013陕西)如图,ABCD,CED90,,5,(,2011,陕西,),如图,,ACBD,,,AE,平分,BAC,交,BD,于点,E,,,若,1,64,,,则,2,_,122,5(2011陕西)如图,ACBD,AE平分BAC交B,中考复习专用-角、相交线和平行线课件,【,例,1,】,(,2016,宜昌,),已知,M,,,N,,,P,,,Q,四点的位置如图所示,,,下列结论中,正确的是,(,),A,NOQ,42,B,NOP,132,C,PON,比,MOQ,大,D,MOQ,与,MOP,互补,C,【例1】(2016宜昌)已知M,N,P,Q四点的位置如图,对应训练,1.,下列选项中,,,MOP,与,NOP,是邻补角的是,(,),C,对应训练C,2,如图,,,直线,AB,,,CD,相交于点,O,,,射线,OM,平分,AOC,,,ONOM,,,若,AOM,35,,,则,CON,的度数为,(,),A,35,B,45,C,55,D,65,C,2如图,直线AB,CD相交于点O,射线OM平分AOC,O,【,例,2,】,(,2016,东营,),如图,,直线,mn,,,1,70,,,2,30,,则,A,等于,(,),A,30,B,35,C,40,D,50,C,【例2】(2016东营)如图,直线mn,170,,对应训练,3,(,2016,大连,),如图,,直线,ABCD,,,AE,平分,CAB.AE,与,CD,相交于点,E,,,ACD,40,,,则,BAE,的度数是,(,),A,40,B,70,C,80,D,140,B,对应训练B,4,(,2016,随州,),如图,,直线,ab,,,直线,c,分别与,a,,,b,相交于,A,,,B,两点,,ACAB,于点,A,,,交直线,b,于点,C.,已知,1,42,,,则,2,的度数是,(,),A,38,B,42,C,48,D,58,C,4(2016随州)如图,直线ab,直线c分别与a,b相,5.,(,2015,金华,),以下四种沿,AB,折叠的方法中,,,不一定能判定纸带两条边线,a,,,b,互相平行的是,(,),A,如图,1,,,展开后测得,1,2,B,如图,2,,,展开后测得,1,2,且,3,4,C,如图,3,,,测得,1,2,D,如图,4,,,展开后再沿,CD,折叠,,,两条折痕的交点为,O,,,测得,OA,OB,,,OC,OD,C,5.(2015金华)以下四种沿AB折叠的方法中,不一定能判,【,例,3,】,如图,,两条直线,AB,,,CD,交于点,O,,射线,OM,是,AOC,的平分线,,若,BOD,80,,则,BOM,等于,(,),A,40,B,120,C,140,D,100,【,例,4,】,如图,,,直线,AB,,,CD,相交于点,O,,,AOC,75,,,OE,把,BOD,分成两部分,,且,BOEEOD,12,,则,AOE,(,),A,165,B,155,C,150,D,130,C,B,【例3】如图,两条直线AB,CD交于点O,射线OM是AO,对应训练,6.,(,2016,新疆,),如图,,,ABCD,,,CE,平分,BCD,,,B,36,,则,DCE,等于,(,),A,18 B,36 C,45 D,54,7,(,2016,西宁,),将一张长方形纸片折叠成如图所示的形状,,,则,ABC,(,),A,73,B,56,C,68,D,146,A,A,对应训练AA,8.,如图,,已,知直线,AB,,,CD,相交于点,O,,,OE,平分,COB,,若,EOB,55,,,BOD,的度数是,_,9,(,导学号,30042038,),如图,,,直线,AB,,,CD,相交于点,O,,,OA,平分,EOC,,,若,EOCEOD,23,,,BOD,_,度,70,36,8.如图,已知直线AB,CD相交于点O,OE平分COB,,中考复习专用-角、相交线和平行线课件,第5讲分式方程,第5讲分式方程,中考复习专用-角、相交线和平行线课件,中考复习专用-角、相交线和平行线课件,解:,x,3,解:x3,中考复习专用-角、相交线和平行线课件,中考复习专用-角、相交线和平行线课件,C,C,中考复习专用-角、相交线和平行线课件,中考复习专用-角、相交线和平行线课件,中考复习专用-角、相交线和平行线课件,中考复习专用-角、相交线和平行线课件,第5讲分式方程,第5讲分式方程,中考复习专用-角、相交线和平行线课件,中考复习专用-角、相交线和平行线课件,解:,x,3,解:x3,中考复习专用-角、相交线和平行线课件,中考复习专用-角、相交线和平行线课件,C,C,中考复习专用-角、相交线和平行线课件,中考复习专用-角、相交线和平行线课件,中考复习专用-角、相交线和平行线课件,中考复习专用-角、相交线和平行线课件,