如图,在平行四边形ABCD中,AC、BD相交于点O,则下列结论不一定成立

如图,在平行四边形ABCD中,ACBD相交于点O,则下列结论不一定成立的是(  )

ABO=DO    BSCOD=SAOD CBAD=BCD       DAC=BD

答案

D

【分析】根据平行四边形的性质即可判定.

【解答】解:四边形ABCD是平行四边形,

AO=OCDO=BOBAD=BCD,故AC正确,

SCOD=SAOD,故B正确,

D错误,

故选D

【点评】本题考查平行四边形的性质,记住平行四边形的性质是解题的关键,平行四边形的对角线互相平分,平行四边形的对边相等且平行,平行四边形的对角相等,属于中考常考题型.

 

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