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1、11.2,1 2 3,1 2,1.().,2.,SSS,ABC DEF, ABC DEFSSS,1,2,ABCDEF,ABCDEFSAS,(SAS),F,E,D,C,B,A,ABCDEF, ABCDEFASA,(ASA,F,E,D,C,B,A,3,:ABCDFE,A=D , C=FAB=DE, ABCDFE?,4,( AAS,A,B,D,A,B,C,SSA,:?,1: ,BAE,CAB=DAB,ABCABD, ., ACAB=DAB,SAS,AB=AC,ASA,CBA=DBA,AAS,C=D,CBE=DBE(?),SAS,ASA,AAS,S AB=AB() .,AB=AC,C
2、BA=DBA,C=D,CBE=DBE,2 :,AE=AD,ABDACE, .,: S AE=AD,SAS,AB=AC,ASA,ADB=AEC,AAS,B= C,BDC=BEC(?),SAS,ASA,AAS,(CD=BE?),AA=A () .,4ABCBECDABCABCBD = CE1 = 2,:BE = CD,BD,CEBECCDB.,2ABCBECDABCABCBD = CE1 = 2,:BE = CD,DBC = 21ECB = 22 壩 1 = 2DBC = ECB,DBCECB BD = CE DBC = ECB BC = CB, DBCECBSAS BE = CD,1.,4.,2
3、.,1.ABCDEF,ABCDEF( ) A.AB=DE,AC=DF,BC=EF B.A= D, B= E,AC=DF C.AB=DE,AC=DF,A= D D.AB=DE,BC=EF, C= F,D,2.ABCDEF,AB=DE, A= D, ( ) B= E B. C= F C. AC=DF D. BC=EF,3.ABCDEF,A= D , B= E ,( ) C= F B. AB=DE C. AC=EF D. BC=EF,D,A,4. ,AB=CD, CE=DF,AE=BF, AEDF?,: AEDF,: AB=CD() AB+BC=CD+BC, AC=BD., ACEBDF(SSS),
4、ACEBDFAC=BD() CE=DF () AE=BF (),E=F() AEDF(,),BE=EB(), AC DB() DBE=CEB (,), AC DB, AC=2DB,EAC, :BC=DE,:AC=2DB,AE=EC () DB=EC,DB=EC,DBE=CEB,BE=EB, DBECEB(SAS) BC=DE (),2 . ABC,ADBCD,BEACE,ADBEF,BF=AC,ABC( ),A.40 B.50 C.60 D.45,1.,1=2,AC=AD,:AB=AE,BC=ED,C=D, B=E,ABCAED( ). A.4 B.3 C.2 D.1,B,D,3.BAC=DAEABD=ACEBD=CE AB=AC,3.().,2,1,P16 -1213,P,
