∴∠B=∠DEF．
∵BE=CF，
∴BC=EF．
∵∠ACB=∠F，
∴
|
∴△ABC≌△DEF（ASA）．
如图，已知点E，C在线段BF上，BE=CF，AB∥DE，∠ACB=∠F．求证：△ABC≌△DEF．
如图，已知点E，C在线段BF上，BE=CF，AB∥DE，∠ACB=∠F．求证：△ABC≌△DEF．
数学人气：830 ℃时间：2020-03-14 21:34:32
优质解答
证明：∵AB∥DE，
∴∠B=∠DEF．
∵BE=CF，
∴BC=EF．
∵∠ACB=∠F，
∴
，
∴△ABC≌△DEF（ASA）．
∴∠B=∠DEF．
∵BE=CF，
∴BC=EF．
∵∠ACB=∠F，
∴
∴△ABC≌△DEF（ASA）．
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