贵刊(初中版)2011年10月(下)期刊登的《关于中位线规律猜想题解法》一文,读后颇受启发,文中有关“猜想线段长度规律”的例5其解析:通过观察、归纳、猜想得出规律,但没有证明猜想所得规律,正如“编后语”中所言:在尚未证明之前,只是猜想,不能作为根据.本文给出该规律的证明及拓展,作为这个问题的补充与延伸,以利于读者提升“观察、分析、归纳、猜想、证明”的探究习惯和提出问题的能力. Excerpts from the article “On the law of the median line of conjecture solution,” published in your journal (Junior High School Edition) in October 2011 (the second issue) Through observing, inducing and guessing, we can get the law, but we can not prove the law of conjecture, just as in the “afterword”: before it is proved, it is only the conjecture and can not be used as the basis. , As a supplement and extension of this issue, in order to facilitate the reader to enhance the “observation, analysis, induction, conjecture, proof ” inquiry habits and the ability to ask questions.