许多同学都喜欢折纸,对于有些折纸问题,要折得出折得好,需要数学知识和数学思考的支撑.对折(折叠)可以得到相等的线段、相等的角,它的本质是轴对称.下面我们一起用长方形纸片折出各种特殊三角形、特殊四边形和几种正多边形,折一折,思一思;思一思,折一折,动手又动脑,享受、体验折纸的快乐,经历其中包含的数学思想.一、折特殊三角形.1.折等腰三角形. Many of our classmates like origami, and for some origami problems, you have to fold up well and need support from mathematical knowledge and mathematical thinking. Folding (folding) can get equal segments, equal angles, and its essence is axisymmetric. We use rectangular paper folded out with a variety of special triangles, special quadrilateral and several regular polygons, a discount, think a thought; think a thought, a discount, hands and mind, enjoy, experience the joy of origami, through which Contains the mathematical thinking First, fold the special triangle .1 fold the isosceles triangle.