如图,OD平分∠AOB,在OA、OB边上取OA=OB,PM⊥BO,于M,PN⊥AD于N求证PM=PN
问题描述:
如图,OD平分∠AOB,在OA、OB边上取OA=OB,PM⊥BO,于M,PN⊥AD于N求证PM=PN
答
证明:∵OD平分∠AOB∴∠ADD=∠BOD∵OA=OB、OD=OD∴△AOD≌△BOD (SAS)∴∠ADO=∠BDO∵∠ADP=180-∠ADO,∠BDP=180-∠BDO∴∠ADP=∠BDP∵PM⊥BO,PN⊥AD∴∠PMD=∠PND=90∵PD=PD∴△PDM≌△PDN (AAS)∴P...