一个平面上的三个圆，每个圆上找一个点。连接三个点构成一个三角形。问：什么时候三角形�长最短？ 知乎 Sketch Coloring Page

一个平面上的三个圆，每个圆上找一个点。连接三个点构成一个三角形。问：什么时候三角形�长最短？ 知乎 Template

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tomski一个平面上的三个圆，每个圆上找一个点。连接三个点构成一个三角形。问：什么时候三角形�长最短？ 知乎 coloring

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