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标题: 求正8边形解法 [打印本页]

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作者: daimlar    时间: 2008-1-6 15:22
标题: 求正8边形解法

求正8边形解法：a regular octgen(正8边形），一个边是x,最长那个对角线是y,平行y的中间只隔一个点的联机z, x=?   thanks...
1)y=20000 

2)z=√20000  
            

Key：D 
                

[attachimg]63072[/attachimg]

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