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1、,12.2 5,SSS,SAS,ASA,AAS,(,SSS,SAS,(,ASA,(,AAS,ABCC =90 _,ABC RtABC,AC,BC,AB,1.,2.,AAS,ASA,1:,1:,B=F=Rt , ,AB=DFA=D, ,A SA,AB=DFC=E,A AS,AC=DEC=E, ,A AS,AC=DEA=D, ,A AS,AC=DEA=DAB=DE, ,S AS,2:,2:,RtABC,C=90RtABCC= 90 BC=BCAB= AB,B,A,軭, MCN=90;, CMBC=BC;, B,AB CNA;, AB., (HL),RtABCRtABC,HL,BC=BC,Rt,Rt
2、,Rt,Rt,5,ACBCBDADAC=BD. BC=AD., ACBCBDAD CD,RtABCRtBAD,RtABC Rt BAD,BC=AD,HL,1CABCDEDAABEBABDEAB,CD CE ,141, DAABEBAB AB,RtACD Rt BCEHL, DA=EB,RtACDRtBCE,CAB AC=BC,CDE DC=EC,2AB=CDAE BCDF BC CE=BF.AE=DF.,=F = =,142,1 AB=CDAE BCDF BC CE=BF. AE=DF., AEBCDFBC ,=F,= =,1 2 3 4 ,AD=BC, DAB= CBA,BD=AC, DBA= CAB,HL,HL,AAS,AAS,ACB =ADB=90 ABC BAD ,AB=CD, BFAC,DEAC,AE=CF BF=DE,AB=CD, BFAC,DEAC,AE=CF BDEF,G,1,AB=CD, BFAC,DEAC,AE=CF BDEF?,C,2,(1) ,(2) ,(3) ,(4) ,SSS,SAS,ASA,AAS,(5) ,HL,1.-HL 2.,
