1.ABCDOP PC*PD=PA*PBPOCBDA2.ABOOA=OB,OABC,OA,OBE,F.1ABO2A=30. O2ECFO FEBCA3.ABOADA=22.5ABCACD=45.(1)CDO2AB=22,BCBDCOA4.RtABCACB=90,BC=5.AC=12,BDABCACD,B,C,DAB EBE=BC;BCDEDC AB5.ABOODAB,CODEOAOD=52,DEBOC=3OA=5,ABCOEBDA6.O6OPOPA,AOPA=30.POOBBCPAC,OD.ADCBCPA,BDB DOACP7.ABOACCD0C,ABDACD=120BD=10.CA=CDOAO DBC8.ABOCDOC,ACDAB.:ADCDAD=3,AC=15,AB. OA BCD9.ABOCOA=OB,OAOD,O8cm,AB=83cm.OAD O BCAE10.RtABCABC=90,AC=4,BC=2,ABOAC,BCD,E.ODEOB CADBOAC1.ABOC,DAD=CD,CAB=30.CDAB;AC=23,AD DOPA12ABOPAOBBCOPOC,AC.ABCPOAAB=2,PA=2,BC( )C B
