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正多边形的中心有一个基本性质:它到各顶点的距离相等,到各边的距离相等.利用这一性质能简便地解答一道中考题:(2013年北京中考题)阅读下面材料:小明有这样一个问题:如图1,在边长为a(a>2)的正方形ABCD各边上分别取
There is a basic nature of regular polygons: it is the same distance to each vertex, to the edge of the same distance. Using this property can easily answer a test questions: (Beijing 2013 senior high school entrance exam questions) read the following material: Xiao Ming has such A problem: As shown in Figure 1, on the sides of a square ABCD with a (a> 2)