如图,已知AB∥DE,BC∥EF,D,C在AF上,且AD=CF,请补充完整过程,说明△ABC≌△DEF的理由.∵AB∥DE∴∠ =∠ ∵BC∥EF∴∠ =∠ ∵AD=CF (已知)∴AD+CD=CF+CD即 = 在△ABC和△DEF中∴△ABC≌△DEF .
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