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正方体是空间几何中的最重要的几何体之一,它颇具美感,有很强的对称性,蕴含着非常丰富的点线面位置关系.在各级各类的考试中我们不难见到这类以正方体为背景的计数问题,这类问题处在知识网络的交汇处,是命题的热点.通过这类问题,可以提高学生对几何结构的认识,培养思维的严谨性.本文
The cube is one of the most important geometries in spatial geometry. It is aesthetically pleasing, has strong symmetry, and contains a very rich positional relationship between points and lines. It is not difficult to see this type of examination in various types of examinations. The counting problem with the cube as the background, this kind of problem is at the intersection of the knowledge network, is the hot spot of the proposition. Through this kind of question, can improve the student’s understanding of the geometric structure, cultivate the rigor of thinking.