4.3 3,SSS ASA AAS, ,1 2,1 2.5cm3.5cm 40 黭, SAS.,2.5cm3.5cm 2.5cm40 ,(2),B, ,4,4,:,?,4,4,5,5,30,30,4,4,30,4,6,40,4,6,40,40,B,C,D,E,A,1.ABACADAE BC,OD=OE,OB=OC,AB=AC,A, EDH=FDH, ED=FD EH=FH,D, 1.ABCDEFAB=DEBC=EFSASABCDEF( ) (A)A=D (B)B=E (C)C=F (D) .,2.1=2 ABDACD( ) (A)AB=AC (B)BD=CD (C)B=C (D)BDA=CDA,3.ABCDEBC FDC:_ ABEBCF(). SASBE=CF CE=DFAASBAE=CBF AEB=BFCBFAE.AE=BF 𰸣BE=CF(𰸲),1.BEABEF BDECABC FED,ACFD,ABCFED, BD=EC BDCDECCD BCED,ABCFEDSAS,12,34,ACFD,2.AD=AEAB=AC1=2 ABD ACE,3,SAS EFABCDBDAECFAE=CFBE=DF.ADECBF.,1,2,EFABCD BDAB=CDAD=BC., AE=CF.,ABCBD=CEADBEPAPE( ) (A)45 (B)60 (C)55 (D)75,ABCB=60 BACADACB CEO, CDAE=AC,1. ,SAS,2. ,SSSSASASAAAS,3.,