如图,点D,E在BC上,且FD//AB,FE//AC.求证:△ABC~△FDE

问题描述:

如图,点D,E在BC上,且FD//AB,FE//AC.求证:△ABC~△FDE

证明:
∵FD//AB
∴∠ABC=∠FDE
∵FE//AC
∴∠ACB=∠FED
∴⊿ABC∽⊿FDE