《数学课程标准》中指出,“空间观念”指能由实物的形状想象出几何图形;由几何图形想象实物形状,进行几何体与其三视图、展开图之间的转化;能从较复杂的图形中分解出基本的图形,能描述实物或几何图形的运动变化;能采用适当的方式描述物体间的相互关系;能运用图形形象地描述问题,利用直观进行思考。发展学生的空间观念,除了七年级上册第一章丰富的图形世界和九年级上册视图投影外,还有位置的确定,图形的变换,如轴对称,中心对称,平移,旋转,位似图形等变换 “Mathematics Curriculum Standard” pointed out that “space concept ” refers to the geometry can be imagined from the physical shape; geometry from the physical shape, geometric geometry and its three views, expand the conversion between the picture; from the more complex Graphic decomposition of the basic graphics, can describe physical or geometric movement changes; can be used to describe the relationship between objects in an appropriate manner; can use the graphical description of the problem, the use of intuitive thinking. The development of students’ space concept, in addition to the seventh grade in the first chapter of the rich graphic world and the ninth grade upper excerpt, but also to determine the location, graphics transformation, such as axisymmetric, centrosymmetric, translation, rotation, bitmap graphics Transform