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1.复习指导在高考中对立体几何的考查除“三基”以外,近几年对空间观念和空间想象能力的考查更加重视,从考题看对空间想象能力的考查基本上分为三个方面(也是三个层次):(1)识图.即能够根据题目条件(文字或直观图)想象出空间形体及特征,用直观图正确表示空间形体.(2)理解图.即将概念与图形相结合,从直观图把握空间形体各种元素之间的关系及性质.(3)应用图.即对图形的处理,包括:依条件添加辅助线、辅助面;空间问题与平面问题之间的转化;对图
1. Review guidance In addition to the “three bases”, in addition to the “three bases”, the examination of spatial concepts and spatial imagination has become more important in the college entrance examination. Examinations of spatial imagination ability are basically divided into three aspects. (It is also three levels): (1) Recognition of maps. It is possible to imagine spatial features and features based on problem conditions (text or visual diagrams), and to correctly represent spatial features using intuitive diagrams. (2) Understanding diagrams. Coming soon. Combine and understand the relationship between the various elements of the spatial shape from the intuitive diagram and the nature. (3) Application diagram. That is, the processing of graphics includes: adding auxiliary lines and auxiliary surfaces according to conditions; transformation between space problems and plane problems. ;