哈哈 我有P17 延长AE交BO延长线于F∠OAF+∠AED=2+∠BOD∵∠AED=∠BOD=90°∴∠OAF=∠2在△BOD和△AOF中∠OAF=∠2BO=AO∠BOD=∠AOF∴△BOD≌△AOF(ASA)在△ABE和△FBE中∠1=∠2BE=BE∠AEB=∠FEB∴△ABE≌△FBE（ASA）...