如图（3），在三角板△ABC中，∠ACB = 90℃，∠B = 60℃，BC = 1，三角板

如图（3），在三角板△ABC中，∠ACB = 90℃，∠B = 60℃，BC = 1，三角板绕直角顶点C逆时针旋转，当点A的对应点A′落在AB延长线上时即停止转动，则点A转过的路径长为 .

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解析:略

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