如图,在△ABC中,AB=AC,点D是△ABC内一点,点E和点D在AC的异侧,并且AD=AE,∠AED=∠ACB,则BD=CE吗?请说明理由.
问题描述:
如图,在△ABC中,AB=AC,点D是△ABC内一点,点E和点D在AC的异侧,并且AD=AE,∠AED=∠ACB,则BD=CE吗?请说明理由.
答
BD=CE,理由是:∵AB=AC,AD=AE,∴△ABC和△ADE均为等腰三角形,∴∠ACB=∠ABC,∠AED=∠ADE,∵∠AED=∠ACB,∴∠ACB=∠ABC=∠AED=∠ADE,∵∠ABC+∠ACB+∠BAC=180°,∠ADE+∠AED+∠DAE=180°,∴∠BAC=∠DAE,∴...