如图: https://assets.asklib.com/psource/2014042909183565297.png ABCD为矩形,AB=4,BC=3,边CD在直线L上,将矩形ABCD沿直线L作无滑动翻转,当点A第一次翻转到点A1位置时,点A经过的路线长为:
![](/upload/20220827/c85071da6ff0aadc10ebce6c25bb4f0d.png)
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