先往一個方向走200/sqrt(3),然後沿著圓的切線走,和圓相切以後沿著圓弧走7/6*PI,最後再沿切線走100。
先往一個方向走200/sqrt(3),然後沿著圓的切線走,和圓相切以後沿著圓弧走7/6*PI,最後再沿切線走100。
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