全等三角形的性质和判断是各地中考中的一个重点.新课标下的几何命题降低了几何证明的难度,将全等图形充分地与几何变换有机的结合,用以考查学生在运动变化中对图形的空间想象和理解能力.纵观近几年各省市的中考题,将全等图形和旋转变换相 The nature and judgment of congruent triangles is one of the key points in the middle school entrance examinations.The geometric proposition under the new curriculum standard reduces the difficulty of geometric proof and fully combines the congruent graph with the geometric transformation to examine the students' On the graphic space imagination and understanding ability.According to the examination questions of provinces and cities in recent years, the congruent graphics and rotation transform phase