您好,欢迎访问三七文档
41.2.3.1.2.RtABCC=90A=30BCACAB=1ABC108AABACBDABCBCABCD2.3ADABCBDACFEBDCDABAC.4BFCEBF=CEABEDACFDAB=DEAC=DF.5ABCPPA3PB4PC5APB6ABCACB=90AC=BCAEBCECDGABAPCBCCFAEFBBDBCCFD1AE=CD;2AC=12BD.7CEFABCD.1AEF=AFE(2)B8ABCC=2BADABC1=BAB=AC+CD.9ABCADBCEADBEACF.AF=21FC101ABCDCA'B'CD'B'CB=30AE.11AD,BEABCBC,ACM,NAD,BECBM=ACN.AM=BN.12ADBCOOA=ODOB=OCEFADAE=DFABEDCF.BECF.1BEADCFADBE=CF.1ADABC2BF,CEBFCEABCOFEDCBA2ABCOACPPB=PDDEACE1PE=BO2AC=3aAP=xPBDEyyx3ABCDADBCMNABCDADBCMNEFDEN=F.4COBCDM5ABCADBCABACEF=2AD16ABC2PQACPABQCBCPQACDPEACEPQDE1BADBED18ABDDBE108ABED36CABC72DECEDCCDCEBCABCD2ABFADE9090FABBAEEADBAEFBAEDA90FBAEDAABFADE3ABDECDBADCADECAD4BF+CF=CE+CFBF=CEBF+CF=BCCE+CF=EFBC=EFABDEACFDB=EDFE=BCABF=CEDEFABCASAAB=DEAC=DF5ABP600PQPBQPQCAPB=1500690901BDBCCFAEDBC=ACB=EFC=90D+BCD=90FEC+BCD=90D=FECDBC=ACE=90AC=BCDBCACEHLAE=CD21BDCACEBC=AC=12BD=CEAEBCBE=EC=12BC=6BD=CEBD=67CB=CE,CD=CFB=CEBD=CFDB=D(CEB=CFDCEF=CFE=60CEB+CEF+AEF=180CED+CFE+AFE=180AEF=AFE(2)B=X,A=180XCEB=XAEF=AFE,A=AEF+AFE=180(180X)+2AEF=180AEF=X/2CEB+CEF+AEF=180X+60+X/2=180X=80B=808ACCDABAEBEAEDEDB1=BAED=2BAED=C=2BADABCCAD=DAEAED=CAD=DAACDAEDAASAC=AECD=DE1=BDE=BECD=BEAB=AE+BEAC=AECD=BEAB=AC+CD9CFGDGFG=GCBD=DCDGBFAEED=AFFGAE=EDAF=FGFCAF=21AF=21FC10ABDCAFAEBDEDCF11ABCADBCBEACBAM=CBNCBM=ACNABM=BCNABMBCNAB=BCBAM=CBNABM=BCNASAABMBCNAM=BN12BECFEFABEDCFEBAOABEFCDODCFBAOCDO.
本文标题:经典初中数学题
链接地址:https://www.777doc.com/doc-3604876 .html