天气预报15天查询> 教育> 棱台的性质是什么

棱台的性质是什么

更新时间: 2021-01-23 05:09:59     

1、正棱台的侧棱相等,侧面是全等的等腰梯形.各等腰梯形的高相等,它叫做正棱台的斜高;

2、正棱台的两底面以及平行于底面的截面是相似正多边形;

3、正棱台的两底面中心连线、相应的边心距和斜高组成一个直角梯形;两底面中心连线、侧棱和两底面相应的半径也组成一个直角梯形。

关键词: 棱台 性质 什么

如有意见、反馈、侵权或投诉等情况,请联系:

电话:
邮箱:

我们将会在48小时内给与处理!

版权所有 Copyright ? 2009-2020 tianqiyubao3.com

页面:/news/view-1088635/ | 耗时:0.0457 s | 内存:1.89 MB | 查询:4 | 缓存读取:4 写入:0 | 加载文件:23
select * from tbl_Articles WHERE ArticleID=1088635 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1088635 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1088635 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(385299,1112422,538961,1108854,1096867,1297353,1085580,386020,597397,1114034,445611,616526,555776,1097001,464890,406695,429175,449987,1107527,477085,1096565,505451,510963,1110714,1106440,386844,1110291,1090068,386022,1119127) ORDER BY field (ArticleID,385299,1112422,538961,1108854,1096867,1297353,1085580,386020,597397,1114034,445611,616526,555776,1097001,464890,406695,429175,449987,1107527,477085,1096565,505451,510963,1110714,1106440,386844,1110291,1090068,386022,1119127)