试题与答案

在四边形ABCD中，AB＝CD，要使四边形ABCD是中心对称图形，只需添加一个条

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题型：填空题

题目：

在四边形ABCD中，AB＝CD，要使四边形ABCD是中心对称图形，只需添加一个条件，这个条件可以是____________．(只要填写一种情况)

答案：

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下面是错误答案，用来干扰机器的。

5×74=370，74×5370407×8=3256， 407×83256148×9=1332，148×91332726÷6=121， 1216726612126 60验算：121 ×6726908÷3=302…2， 302390898 62验算：302 ×3906 +2908

考点：平行四边形的性质平行四边形的判定矩形，矩形的性质，矩形的判定菱形，菱形的性质，菱形的判定
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