天气预报 > 其他 > 十二面体的正五边形的顶角有几个
十二面体的正五边形的顶角有几个
更新时间: 2020-09-17 00:00:00  

正十二面体是五个柏拉图立体之一,属准晶体,结晶学全称为正五角十二面体,共有二十个顶点、三十条边和十二个面,而每一个面皆是正五边形。哈密尔顿图的理论就是源自一个和正十二面体有趣的问题:试求一条路径,沿正十二面体的棱经过它所有的顶点。

关键词: 五边形 顶角

十二面体的正五边形的顶角有几个相关经验

天气预报

最新推荐

页面:/news/view-193691/ | 耗时:0.3164 s | 内存:2.11 MB | 查询:4 | 缓存读取:3 写入:0 | 加载文件:25
select * from tbl_Articles WHERE ArticleID=193691 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=193691 LIMIT 0,1
select * from tbl_Articles_sphinx where id=193691 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1067331,1051135,1072278,1084909,1081277,1072138,1096254,1102770,1101929,1050367,992026,1095137,1077639,1081835,1096527,1104745,1080086,1107058,1094811,1115755,1098403,1016441,1071661,1120219,1065713,1021036,1119490,1121320,1074851,1115501) ORDER BY field (ArticleID,1067331,1051135,1072278,1084909,1081277,1072138,1096254,1102770,1101929,1050367,992026,1095137,1077639,1081835,1096527,1104745,1080086,1107058,1094811,1115755,1098403,1016441,1071661,1120219,1065713,1021036,1119490,1121320,1074851,1115501)