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1、11.2.3 (ASA,AAS), 1. 2., , , ,𣺽ASA AAS,:, (ASA, AOC BOD: A=B, , 1=2, AOCBOD (ASA),AO=BO, (ASA,1,2,3.DABEACBECDOAB=ACB=C (1)AD=AE; (2)BD=CE, ADCAEB,A=A AC=AB C=B,ACDABEASA AD=AE AB=AC BD=CE,? ,?,(2),(1),C,B,E,A,D,(2) ,(2),6,ABCDEF,A D, BE, BCEF, ABCDEF,ABCDEF, A +B +C1800, D +E +F =1800, A D,
2、 BE, CF, BE, BCEF, CF, ABC DEF ASA,.,ABC ABC,A= A,BC= BC,B= B,(AAS),ASA,AAS,ASA, 1. .,BC,2. 1 2,:,1 (SSS),3 (ASA),4 (AAS),2 (SAS),1ACB=DFEBC=EFSAS,ASAAAS - ABCDEF.,2BE=CD1=2AB=AC,AC=DFB=EA=D,: ,OABA= B AOCBOD?,(),(),(), ,: ,OABC= D AOCBOD?,(),(),(), ,C= D,(AAS),1. ABABBFCDBC=CDBFDEA CE DEAB, P13: 1,
3、2. ,ABCEDC, B=EDC=900 BCDC, 12, ABC DEF ASA ABED.,1,2,2.,ABBC, ADDC, 1=2. : AB=AD., P13: 1,2. ,ABCADC, B=D, 12, ACAC, ABC ADC AAS ABAD., ABBC, ADDC, B=D=900,:,: B=DEF, BC=EF, :ABC DEF (1)SAS (2)ASA (3)SSS ,ACB= DEF,AB=DE,AB=DEAC=DF,(4)AAS ,A= D,(1) ? .,.,:,(),(),(),(3) ACBDO,AC=BD,AB=CD. ,:,: (1)AD, ADCDAB,AD=DA AC=DB DC=AB,ADCDAB SSS C=B,(2) AOB DOC, B = C 1=2 DC=AB,DOCAOB AAS OA=OD ,1,2,(1) .,ASA.,(2) .,AAS.,3 ,
