, SAS, (ASA), (AAS), (SSS),塢,2. ,1. ,4. ,3. ,5. ,SAS),ABC,AB=3cmAC=4cm,2. AMAB= 3cm,3. ANAC=4cm,A=45ABC,1. MAN= 45,4.BC,ABC,ABCDEFAB=DE , AC=DF , A=D , ABCDEF,D,E,F,ABCDEF,ABCDEF,AB=DE A=D AC=DF,ABCDEFSAS,SAS, 1,1AC=ADCAB=DAB ACBADB,AC=AD,CAB=DAB AB=AB ACBADBSAS,1,ACBADB, ,2,2ADBCAD=CB ADCCBA,AD=CBAC=CA12,跨1=2,AD=CB 1=2 AC=CA ADCCBASAS,2,ADBC 1=2 DACBCA,D,C,1,A,B,2,B, ,3,3 ADBCAD=CBAE=CF AFDCEB,ADBC A=C AE=CF AE+EF=CF+EF AF=CE AFD CEB ,AD=CB A=C AF=CE AFDCEBSAS,D=B ,232AE=CFAF=CE,1, ,4ABCDAC=DBAE=DFEAADBCACAD,4,1EABFDC2DF= AE, ,1SAS,2,5,2 5AB=ACAD=AE1=2 ABDACE,1=2 1+BAE = 2+BAE CAE= BAD,CAEBAD ,AC=AB CAE=BAD AE=AD ABDACESAS, BAE CAE=BAD,2 ,1E=D 2ACEA1=900EC BD,EAD ,5,5AB=ACAD=AE1=2,1,2, ,1SAS,2,3任,1,2,ASA,岻 ,C,B,E,A,D,ABC A/B/C/A/B/=AB A/ =A B/ =B A/B/C/ABC ,1:, ABC A/B/C/ A/B/AB A/ =A B/ =B ,2 A/B/DA/ B/ =A EB/A/ =B A/ DB/EC/,1A/B/AB,A/B/C/,ABC(A/B/C/,B/C/=BC, B/= B, C/= C.,1A/B/=AB 2A/B/A/B/ D A/B/=A, E B/A/=B , A/D B/EC/, A/B/C/, ASA),1DAB=CABC=D AC=AD, DAB=CABC=D,ABD=ACD (,ACBADB,DAB=CAB AB=AB ABD=ACD, ACBADB ASA),AC=AD,:,2DABEACBECDOAB=ACB=C. BD=CE,ABEACD,A= A AB=AC B=C, ABEACD ASA),AD=AE,AB=AC,BD=CE,ACE BDF,AC=BD,A=B,C=D,AC=BD,A=B,AEC=BFD,1ABE=CBD, BCE=DBA,EC=AD AB=BE,BC=DB 2AD, EF,BCOAO=ODBO=OCEO=OF AEBDFC,AAS,:,ABCDEFA=D B=E BC=EFABCDEF,A+B+C=180 D+E+F=180 A=D B=E C=F,C=F BC=EF B=E,ABCDEF (ASA), ABCDEF, ,A=D B=E BC=EF,ABCDEF (AAS),1.DABEACBECD OAD=AEB=C BD=CE,1=2D=C AC=AD,_ _ _ _ _ _ _,ABD,ABC,1=2,D=C,AB=AB,ABD,ABC,AC=AD,AAS,SSS,:,A,B,C,D,AC=DE AB=DF BC=FE ABC DFE,E,F,:,A,B,C,D,AC=DC AB=DB ABC DBC,AD AC=DC CAD= CDA BAD= BDA BAC= BDC AC=DC A= D AB=DB ABC DBCSAS,A,C,D,B, ABCDBC ,AC=DC AB=DB BC=BC,ABC DBCSSS,1AB=CDBC=DA 1ABCCDA 2B=D,A,B,C,D,1ABCCDA AB=CD BC=DA AC=CA ABCCDASSS 2 ABCCDA B=D,1 BECFABDEACDFBECFAD,BECF, BCEF,ABCDEF,ABDE,ACBF,BCEF,ABCDEFSSS,AD(, BE+EC=CF+EC,2ABCDADCBBD,AC,ABCD,ACAC,BCAD, ABC CDASSS, BD,ABC ADC,BD,𣺡ABCADCABCDADBC, SAS, (ASA), (AAS), (SSS),塢 ,1AC BDOOA=OC OB=OD EFOAB CDEF,OE=OF,AOBCOD OB=OD AOB=COD OA=OC AOBCOD SAS B=D BOEDOF B=D OB=OD BOE=COF BOEDOF ASA OE=OF ,AB=DC,AC=DB,BC=CB,ABCDCB,AB=DCAC=DB ABO=DCO, ABCDCB,SSS, A=D (),AOBDOC,A=D AOB=DOC AB=CD, AOBDOC,AAS, ABO=DCO , ACBC ADBD AD=BC CEAB DFABEFCE=DF,ABCBAD,CE=DFACEADFABCBAD,BFRtABCACB=90CDBFCDEEGACABG FGAB,BFABC,12,CDAB 3+ABC=90 ACB90 A+ABC=90 3A,EGAC A4 34,BEGBEC 12 34 BEBE BEGBEC,AAS,BG=BC ,BFGBFC,BG=BC 12 BF=BF,BFGBFC SAS,FGB=FCB=90 FGAB, ABCADBACDEDFABACEFADEFH ADEF,RtABCAB=ACBAC=90AANBDANDCEANE DE=BDCE,BAC=90 1290,BDAN 2390 13,CEAN ADBAEC90,ADBACE,13 ADBACE ABAC,ADBACE,AAS,ADCE BDAE ,DEAEAD DEBDCE,