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旋转是几何图形运动中的重要变换,如果我们能根据题目特征加以观察,通过旋转,找到解题的突破口,那么问题就简单化了.
Rotation is an important transformation in the movement of the geometry. If we can observe it according to the characteristics of the topic and find the breakthrough of the problem by rotation, then the problem is simplified.