画线段AB,在线段AB外取一点O,作出线段AB绕点O旋转180°后所得的线

画线段AB,在线段AB外取一点O,作出线段AB绕点O旋转180°后所得的线段AB请指出ABAB的关系,并说明你的理由

答案

ABABABABAOB≌△AOB

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