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《初中数学教与学》2014年第1期刊登了孙红艺老师的《转化构图巧解题》一文,简称文[1],读完这篇文章,被孙老师构造不同位置的等腰三角形四种巧妙解法所折服.但是,将这些方法搬到课堂教学中,学生也许会问:“这些巧夺天工的妙法您是如何想到的?”基于这样的情况,笔者总结了解涉及一组邻边是两倍关系的平行四边形问题的三条途径:逆思、补形、分割,供大家参考.
“Junior high school mathematics teaching and learning” in 2014 the first issue of Sun Hongyi teacher “transformation of the composition of the problem-solving solution,” a short article [1], after reading this article, was constructed by different positions of the Sun Isosceles triangle four However, moving these methods to classroom instruction may ask: “How do you think of these wonderful ways?” "Based on this situation, the author concludes that understanding involves a set of neighbors that are two Times the parallelogram of the relationship between the three ways: reflection, shape, segmentation, for your reference.