正25边形的一个简洁且高精度做法

其实人在大陆,只是经常被删帖,所以到此来混混。闲言碎语,打发时光。
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渔夫在今年的最后一天,忽然发现一个超级简单的正25边形的尺规作图法,精度在E-10级,如果用360度的度数表示,小数后面要跟7个0 呢。做法简单,一共两个圆,7条直线。连作法也不用写了。给有兴趣的网友参考吧。可以在假期里用来哄大孩子哦。
蒲汇塘渔夫 发表评论于
回复lhzhang666的评论:
谢谢指出错误,有些不好意思啊,两个2漏了平方了。
lhzhang666 发表评论于
谢谢分享。挺不错的游戏。哄大孩子的时候,别忘了加上一句"图中说明有2~3处错误,你能找到吗?找到后别忘了管老爸老妈请赏哦!"
temptemp 发表评论于
as matter of fact, what autocad did is exact number with no errors.
but I still admire your effort, good job.
蒲汇塘渔夫 发表评论于
yes. you can do any regular polygon as you want. but how do you know the accuracy of the auto-cad? how can you check? with this classic method, you can check if you want. But most time it is not necessary.
temptemp 发表评论于
if you use autocad, you can make any 边形 you want in less than 5 seconds.
your 25 边形 looks almost like a circle.
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