证明:在平行四边形ABCD中,AD∥BC,
∴∠ADB=∠CBD.
又BN=DM,BE=DF,
∴△BNE≌△DMF.
∴MF=NE,∠DFM=∠BEN.
∴EN∥FM.
∴四边形MENF是平行四边形.
已知如图,在平行四边形ABCD中,BN=DM,BE=DF.求证:四边形MENF是平行四边形.
已知如图,在平行四边形ABCD中,BN=DM,BE=DF.求证:四边形MENF是平行四边形.
数学人气:674 ℃时间:2020-04-21 16:26:23
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