有三角形abc,其内部包含一条端点为b、c的光�凸曲线,如何证明曲线的长度小于三角形剩余两边之和? 知乎 Template




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tomski有三角形abc,其内部包含一条端点为b、c的光�凸曲线,如何证明曲线的长度小于三角形剩余两边之和? 知乎 coloring