图形的剪拼问题,学生基本都是凭空间想像去画画拼拼,有的能画出来但画不全面,有的一个也画不出来.我最初接触时也是认为空间想像力强的学生会做,空间想像力差的也不好培养,但细细研究下来,找出了这个问题的实质与规律,现把自己的一些简单的认识总结如下:一、两个全等(非直角)三角形拼四边形拼法:一组对应边重合有两种情况:情况1:两个全等三角形关于重合边AC成轴对 Graphics cut spelling problems, the students are basically imagination to draw pictures spelling, and some can draw but the picture is not comprehensive, and some one can not draw it.I also initially think that space imagination students will do, Space imagination is not good training, but a careful study down to find out the essence of the problem and the law, is to summarize some of their simple understanding is as follows: First, the two congruent (non-right angle) triangle fight quadrilateral fight Law: A group of corresponding edge coincidence There are two cases: Case 1: Two congruent triangles on the coincident edge AC into the axis pairs