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折叠与展开问题是立体几何的两个重要问题,也是竞赛和高考对立体几何考查的热点问题.这两种方式的转变正是空间几何与平面几何问题转化的集中体现.处理这类题型的关键是抓住两图的特征
Folding and unfolding problems are two important issues of the three-dimensional geometry, and are also hot topics in the competitions and college entrance examinations on the three-dimensional geometry. The transformation of these two methods is the concentrated expression of the transformation of space geometry and plane geometry problems. The key is to capture the characteristics of the two figures