旋转问题以运动变化为特点,题型灵活多样,它包括点、线、体各种类型,涉及代数、几何的各个方面,今以近几年的中考题为例,略加解析,以飨读者.一、以点为中心三角形的平面旋转例1如图1,在ABC中,∠C=90°,AC=2cm,把这个三角形在平面内绕点C顺时针旋转90°,那么点A移动所走过的路 The rotation problem is characterized by movement changes. The types of questions are flexible and diverse. It includes various types of points, lines, and bodies, involving various aspects of algebra and geometry. Take the examination questions in recent years as an example. First, the point of the center of the triangle plane rotation example 1 In Figure 1, in ABC, ∠C = 90 °, AC = 2cm, the triangle in the plane around the point C clockwise rotation 90 °, then the point A moves Way to walk