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1、11.2 (),1.,2.?,ABCA/B/C/A/B/=ABA/ =A B/ =B A/B/C/ABC,1,2 A/B/DA/ B/ =A EB/A/ =B A/ DB/EC/,1A/B/AB,A/B/C/, (ASA, ABCDEFA=D B=E BC=EFABCDEF ,2, ABC=180o DEF=180o, C=F, A=D B=E,ABCDEF,B=E,C=F,BC=EF, ABCDEF ASA, , (AAS, ABCDEF AAS,ABCDEF,1.DABEACBECDOAB=ACB=C AD=AE, ADCAEB,A=A AC=AB C=B,ACDABEASA,AD=AE,
2、O,2.AB=ACAD=AE,BDCE,.,2.1=23=4 AC=AD,3=4 , D=C ?, 1=2C=D AC=AD, 3=4, ABC=ABD,AB C ABD,1=2,ABC=ABD,AB=AB, AB C ABD (ASA), AC=AD,AO=BO,ABCDADBCAB=CD ADBC, AB=CD BC=AD , ,AC, ABCDADBC , 12 34,ABCCDA,12 ,AC=AC ,34 , ABCCDAASA,2.1=2C=D AC=AD,ABDABC 1=2 D=C AB=AB ABDABC AAS AC=AD , ASA AAS,P13 P15 11.2 561112,
