如图,矩形ABCD的对角线AC、BD相交于点O,CE∥BD,DE∥AC,若AC=4,则四

如图,矩形ABCD的对角线ACBD相交于点OCEBDDEAC,若AC=4,则四边形CODE的周长(  )

A4     B6      C8     D10

答案

C

【考点】菱形的判定与性质;矩形的性质.

【分析】首先由CEBDDEAC可证得四边形CODE是平行四边形,又由四边形ABCD是矩形,根据矩形的性质,易得OC=OD=2,即可判定四边形CODE是菱形,继而求得答案.

【解答】解:CEBDDEAC

四边形CODE是平行四边形,

四边形ABCD是矩形,

AC=BD=4OA=OCOB=OD

OD=OC=AC=2

四边形CODE是菱形,

四边形CODE的周长为:4OC=4×2=8

故选C

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