在平面内,将一个图形绕一个定点旋转一定的角度,这样的图形运动称为图形的旋转.图形的旋转不改变图形的形状、大小.解几何题时,当题中遇到含有邻边相等的多边形且感觉题目有难度时,可设法找一个包含上述边的三角形进行巧妙地旋转,往往能化难为易,事半功倍.现从2012年全国各地中考数学试卷中,撷取两例,解析如下,供同学们学习时参考. In the plane, a graphic around a fixed point rotation angle, such graphics movement is called graphics rotation. Graphics rotation does not change the shape and size of graphics. When solving geometric problems, Of the polygons and feel the difficulty of the topic, you can try to find a triangle that contains the above-mentioned edge to be cleverly rotated, often can make it harder for the easier, with less .From the 2012 national examination papers in mathematics, retrieve two cases, as follows, For students to learn reference.