多面体截面的作图较难,方法也不只高中《立体几何》课本中的几种基本作图法。探讨、研究多面体作图问题有利于激发学生的学习兴趣,开阔学生的视野,提高学生的几何作图能力。但《立体几何》中的作图易受《平面几何》中尺规作图习惯定势的干扰。原因是没有弄清两种作图 The polyhedron cross-section mapping is more difficult and the method is not limited to several basic mapping methods in the high school “Three-Dimensional Geometry” textbook. Exploring and studying polyhedron mapping problems is conducive to stimulating students’ interest in learning, broadening their horizons, and improving students’ ability to draw geometry. However, the drawing in “Three-Dimensional Geometry” is easily disturbed by the habit of fixed-footprinting in Plane Geometry. The reason is that we haven’t figured out two kinds of mapping