发布网友 发布时间:2024-10-18 19:45
共1个回答
热心网友 时间:2024-10-23 05:30
见解析
证明:∵△AEB由△ADC旋转而得,
∴△AEB≌△ADC,
∴∠EAB=∠CAD,∠EBA=∠C,
∵AB=AC,AD⊥BC,
∴∠BAD=∠CAD,∠ABC=∠C,
∴∠EAB=∠DAB,
∠EBA=∠DBA,
∵∠EBM=∠DBN,
∴∠MBA=∠NBA,
又∵AB=AB,
∴△AMB≌△ANB(ASA),
∴AM=AN.
热心网友 时间:2024-10-23 05:33
见解析
证明:∵△AEB由△ADC旋转而得,
∴△AEB≌△ADC,
∴∠EAB=∠CAD,∠EBA=∠C,
∵AB=AC,AD⊥BC,
∴∠BAD=∠CAD,∠ABC=∠C,
∴∠EAB=∠DAB,
∠EBA=∠DBA,
∵∠EBM=∠DBN,
∴∠MBA=∠NBA,
又∵AB=AB,
∴△AMB≌△ANB(ASA),
∴AM=AN.