论文部分内容阅读
通过学习,同学们已经知道了,不管一个多边形有多少条边,它的外角和始终都是360°.这个结论是如此漂亮,以至于我们忍不住会想,它的背后有没有什么更为简单的道理呢?有的!看了下面这段文字后,你就会恍然大悟:多边形的外角和显然是360°.假设图1中的五边形ABCDE是花园里的小路.刚开始的时候,你位于小路上的P点处,面向A点站立.你打算沿着小路逆时针走一圈,最后回到P点.当你走到A点的时候,你的身体需要转过一个角度,才能继续往前走下去.从图中很容易看出,你的身
Through studying, the students already know that regardless of the number of edges of a polygon, its outside angle is always 360 °. This conclusion is so beautiful that we can not help but think that there is nothing more behind it Simple reason? Some! After reading the following text, you will suddenly realized: the outer corner of the polygon and apparently 360 ° .If the pentagonal ABCDE in Figure 1 is a garden path.From the beginning, You are at Point P on the path, facing point A. You intend to go counter-clockwise around the path and finally back to point P. When you come to point A, your body needs to turn an angle Continue to move forward. It is easy to see from the figure, your body