三角形内任意一点与三角形的三个顶点连接的三条线段之和小于这个三角形的三边之和，如何求证？谢谢？ 知乎 Sketch Coloring Page

三角形内任意一点与三角形的三个顶点连接的三条线段之和小于这个三角形的三边之和，如何求证？谢谢？ 知乎 Template

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tomski三角形内任意一点与三角形的三个顶点连接的三条线段之和小于这个三角形的三边之和，如何求证？谢谢？ 知乎 coloring

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