折叠型问题就是把一个图形一部分沿某条直线折叠后,所形成的问题.这类问题既是对称问题的应用,又可考查学生的空间想象能力.现以近年中考题为例,谈谈折叠型问题在四边形中的应用,供同学们学习时参考.一、平行四边形中的折叠问题例1(2004年青海省中考题)如图1,把一张平行四边形 Folding is a problem that arises when a part of a figure is folded along a straight line. This kind of problem is not only the application of symmetry problems, but also the ability of the student to explore the space imagination. Now taking the exam in recent years as an example, talk about the folding type. The application of the problem in the quadrilateral, for students to learn when referencing. First, the folding problem in the parallelogram Example 1 (2004 Qinghai Province exam questions) Figure 1, a parallelogram