如图,在△ABC和△ADE中,AB/AD=BC/DE=AC/AE,点B、D、E在一条直线上,求证:△ABD∽△ACE.
问题描述:
如图,在△ABC和△ADE中,
=AB AD
=BC DE
,点B、D、E在一条直线上,求证:△ABD∽△ACE.AC AE
答
证明:∵在△ABC和△ADE中,
=AB AD
=BC DE
,AC AE
∴△ABC∽△ADE,
∴∠BAC=∠DAE,
∴∠BAD=∠CAE,
∵
=AB AD
,AC AE
∴
=AB AC
,AD AE
∴△ABD∽△ACE.