连结AC∵∠BAC＝∠EAF＝60°∴∠BAE＝∠CAF∵AB＝AC，∠ABE＝∠ACF＝60°∴△BAE≌△CAF∴AE＝AF，∠AFC＝∠AEB＝180°－∠BAE－∠B＝105°∵∠EAF＝60°∴△AEF是正三角形∴∠AFE＝60°∴∠CFE＝∠AFC－∠AFE＝45°
