如图,已知AB/AD=BC/DE=AC/AE,求证:△ABD∽△ACE.
问题描述:
如图,已知
=AB AD
=BC DE
,求证:△ABD∽△ACE.AC AE
答
证明:∵
=AB AD
=BC DE
,AC AE
∴△ABC∽△ADE,
∴∠BAC=∠DAE,
∴∠BAC-∠DAC=∠DAE-∠DAC,
即∠BAD=∠CAE,
∵
=AB AD
,AC AE
∴△ABD∽△ACE.