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山东教育出版社义务教育教科书五四学制数学,七年级上册第二章“轴对称”第60页复习题第13题是一道联系拓广题.题目如下:13.试找出如图所示的每个正多边形对称轴的条数,并填入表格中.根据上表,请就一个正n边形对称轴的条数作一个猜想.学生在轴对称这一章先后学习了轴对称图形及对称轴的定义,通过观察能判断一个图形是不是轴对称图形,并能作出轴对称图形的对称轴.探索了轴对称的性质,经历了探索线段、角、等腰三角形和等边三
Shandong Education Press compulsory education textbooks five four school mathematics, the seventh grade on the second chapter “axisymmetry ” Page 60 review questions 13 questions is a link extension questions. The title is as follows: According to the above table, please make a conjecture on the number of symmetry axis of a regular n-polygon.Students in the axisymmetric chapter has studied the axisymmetric The definition of the graph and the axis of symmetry can be judged by observing whether the graph is an axisymmetric graph and can make the axis of symmetry of the axisymmetric graph.It has been explored that the axisymmetric property is governed by exploring the line segments, angles, isosceles triangles and equilateral triangles