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中学数学教学大纲指出几何教学的目的在于系统的研究平面圆形和空间图形的性质,并且应用这些性质解决计算题作图题…….关于初中几何轴对称与中心对称的理论,无疑的是平面几何圆形的重要性质之一.然而教材中对轴对称与中心对称的应用还不是十分令人满意的,这就表现在它未能在一些定理的证明中发挥其应该发挥的作用.事实上已给读者造成某种程度的错觉,至使学生甚至老师在某些问题
The secondary school mathematics syllabus points out that the purpose of geometry teaching is to systematically study the nature of planar circles and spatial graphs, and to apply these properties to solving computational problem drawing problems.... The theory of axisymmetrical and central symmetry of junior middle school geometry is undoubtedly flat. One of the important properties of a geometric circle. However, the application of axisymmetric and centroidal symmetry in the textbook is not yet satisfactory. This is manifested in its failure to play its role in the proof of some theorems. The reader has been given a certain degree of illusion, so that students and even teachers have certain problems