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(2009•桂林)如图所示,在方格纸上建立的平面直角坐标系中,将△ABC绕点O按...
(2009•桂林)如图所示,在方格纸上建立的平面直角坐标系中,将△ABC绕点O按顺时针方向旋转90度,得到△A′B′O,则点A′的坐标为( )
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A.(3,1)
B.(3,2)
C.(2,3)
D.(1,3)
考点分析:
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