天气预报 > 社会 > 锥体展开角度计算公式
锥体展开角度计算公式
更新时间: 2021-04-21 12:56:44  

1、圆锥台或圆锥体的展开放样,展开角度就是圆心角,设圆锥底面周长为C,底面半径为r,母线长为l,C=2πr,则圆锥展开后的角度为360°*C/2πl。

2、锥体是指包括圆锥、棱锥等在内的空间立体图形,由圆的或其它封闭平面基底以及由此基底边界上各点连向一公共顶点的线段所形成的面所限定。

关键词: 锥体 展开 角度 计算 公式

锥体展开角度计算公式相关经验

天气预报

最新推荐

页面:/news/view-2999921/ | 耗时:0.7205 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=2999921 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2999921 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2999921 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(2708812,3469133,1750179,783903,934546,1047834,953772,1716107,923251,923857,3129579,2032655,810661,907776,1726732,2767768,2999921,484819,420884,1909684,690897,3073352,3437061,1215288,3326640,997514,1687072,1836120,393888,942013) ORDER BY field (ArticleID,2708812,3469133,1750179,783903,934546,1047834,953772,1716107,923251,923857,3129579,2032655,810661,907776,1726732,2767768,2999921,484819,420884,1909684,690897,3073352,3437061,1215288,3326640,997514,1687072,1836120,393888,942013)