如图,在四棱锥
中,
平面
,
,
,
,
,直线
与平面
成
角.设四面体
的外接球的球心为
,球
与平面
的截面为圆
,则以
为顶点,圆
为底面的圆锥的侧面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/5/6d855a0d-0d59-41dc-af08-7be1abb81ec1.png?resizew=119)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68d31600cba2d5256c7e78b6122d6755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9060f03b9ee41d70d135b1e1a8902ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ed75e65e7374c38ffb1f75259a8beb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5679a74e9f5506266ab627894ab03243.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4864c21e9664fa9111ede6425b09563a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/5/6d855a0d-0d59-41dc-af08-7be1abb81ec1.png?resizew=119)
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更新时间:2022-04-20 15:45:17
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【推荐1】已知扇形AOB的半径为r,弧长为l,且
,若扇形AOB的面积为8,则该扇形的圆心角的弧度数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c324ddd2ada8e68c497bd462a8b8a97c.png)
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【推荐2】在
中,
,以
为圆心,
为半径作圆弧交
于点
,若弧
等分
的面积,且
弧度,则( )
![](https://img.xkw.com/dksih/QBM/2022/3/14/2936123324940288/2939105933377536/STEM/6858c93d8a94465c83da2a72a2f108b6.png?resizew=113)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/943095c49e6cde8a2f100da929cf9a72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5dd6306e00de2ae82d6605308792db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eec6ce73c6786d50028addff089bbb64.png)
![](https://img.xkw.com/dksih/QBM/2022/3/14/2936123324940288/2939105933377536/STEM/6858c93d8a94465c83da2a72a2f108b6.png?resizew=113)
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【推荐1】如图,已知直四棱柱
的底面
为边长为1的正方形,
,
为棱
上一动点,若二面角
的平面角
,则线段
的长度的取值范围为( ).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/2e380bab-bb17-4dde-8e8b-950cd7716a31.png?resizew=120)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e42b44019f4f4f9a05d1c8f910a2141.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa5a531329748ceebf20280835a4e60f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/2e380bab-bb17-4dde-8e8b-950cd7716a31.png?resizew=120)
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【推荐2】若
的内角
,
,
所对的边分别为
,
,
,满足
,则
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51a484cac02cfdc27758b5d1c423860e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐1】已知四棱锥
的顶点都在球O上,四边形
所在圆半径为
,该四棱锥的体积最大值为
,则球O的半径为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e778fc5228ce927edf0abbf9e878f3f.png)
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【推荐2】经纬度是经度与纬度的合称,它们组成一个坐标系统,称为地理坐标系统,它是利用三维空间的球面来定义地球上的空间的球面坐标系.能够标示地球上任何一个位置,其中纬度是地球重力方向上的铅垂线与赤道平面所成的线面角.如我国某城市就处在北纬
,若将地球看成近似球体,其半径约为
,则北纬
纬线的长为( )
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【推荐1】已知
是球
表面上的点,
平面
,
,
,球
的表面积等于
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/523bdb05d8e5de2a84ccedb6db738037.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c83f8945042b9c8fb2fbdac9308d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcb76bf599acc7ce4b819603c0183d3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9609625b502348556ff8ba32deac8caa.png)
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【推荐2】已知
是球
的直径,
是球
球面上的两点,且
,若三棱锥
的体积为
,则球
的表面积为
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
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