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(-2,3) (2,-3) (3,-2)或(-2,3) (-2,3)或(2,-3)
(-2,3) (2,-3) (3,-2)或(-2,3) (-2,3)或(2,-3)
(-2,3) (2,-3) (3,-2)或(-2,3) (-2,3)或(2,-3)
(-2,3) (2,-3) (3,-2)或(-2,3) (-2,3)或(2,-3)
(-2,3) (2,-3) (3,-2)或(-2,3) (-2,3)或(2,-3)
在x轴上,点 的坐标为(2,1).如果将矩形OABC 绕点O.旋转180°,旋转后的图形为矩形OA1B.1 1,那么点B.1 的坐标为( ) 图23217 A.(2,1) B.(-2,1) C.(-2,-1) (2,-1)
(3,2) (-2,-3) (3,2)或(-3,-2) (2,3)或(-2,-3)
(-2,3) (2,-3) (3,-2)或(-2,3) (-2,3)或(2,-3)
(-2,3) (2,-3) (3,-2)或(-2,3) (-2,3)或(2,-3)
(-2,3) (2,-3) (3,-2)或(-2,3) (-2,3)或(2,-3)
(-2,3) (2,-3) (3,-2)或(-2,3) (-2,3)或(2,-3)
(3,2) (-2,-3) (2,3)或(-2,-3) (3,2)或(-3,-2)
(3,2) (-2,-3) (2,3)或(-2,-3) (3,2)或(-3,-2)
(3,2) (﹣2,﹣3) (2,3)或(﹣2,﹣3) (3,2)或(﹣3,﹣2)
(-2,3) (2,-3) (3,-2)或(-2,3) (-2,3)或(2,-3)
(-2,3) (2,-3) (3,-2)或(-2,3) (-2,3)或(2,-3)