圆锥
如图①所示,图②是它的正(主)视图.已知圆
的直径为
,
是圆周上异于
,
的一点,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2019/4/15/2183007787024384/2184241760206848/STEM/514b3c2ef1194d98957e468546a80d50.png?resizew=276)
(1)求该圆锥的侧面积
;
(2)求证:平面
平面
;
(3)若
,在三棱锥
中,求点A到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/2019/4/15/2183007787024384/2184241760206848/STEM/514b3c2ef1194d98957e468546a80d50.png?resizew=276)
(1)求该圆锥的侧面积
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15b63176f43bc7a0654d0f6f45e7429.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c646c683fbe522edb7ea54fd3ad873d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf9718967af7a01c5b4866ea6f73bbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
2014·江西上饶·二模 查看更多[5]
更新时间:2016-12-02 21:48:24
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】已知圆锥的顶点为
,底面圆心为
,母线长为
,
,
、
是底面半径,且:
,
为线段
的中点,
为线段
的中点,如图所示:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/11/c40f87d2-d838-4937-9915-5400f1256474.png?resizew=125)
(1)求圆锥的表面积;
(2)求异面直线
和
所成的角的大小,并求
、
两点在圆锥侧面上的最短距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63864e565fc5d07d748a61b542294484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19468abe1aa4e99874d13b8359ec7332.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/11/c40f87d2-d838-4937-9915-5400f1256474.png?resizew=125)
(1)求圆锥的表面积;
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
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解题方法
【推荐2】如图所示,圆锥
的底面圆半径
,母线
.
![](https://img.xkw.com/dksih/QBM/2021/11/5/2844892706889728/2848263899783168/STEM/841e278d77364743a9c25da489bdf846.png?resizew=256)
(1)求此圆锥的体积和侧面展开图扇形的面积;
(2)如图,半平面
与半平面
所成二面角
大小为
,设线段
中点为
,求异面直线
与
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e5ef91fb27dd684a27ae7f1993cfba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52705567101a48893de582656ef41527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f643db1101c352132c1d670e9cb30e.png)
![](https://img.xkw.com/dksih/QBM/2021/11/5/2844892706889728/2848263899783168/STEM/841e278d77364743a9c25da489bdf846.png?resizew=256)
(1)求此圆锥的体积和侧面展开图扇形的面积;
(2)如图,半平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97fa483ce5e3575ff399722caba7b943.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2b5f083dd0e4ff840eb8be0ea0087f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25ff141641fb0b217ab5a20bfce11ac3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231b861d6d1f1d0b9f52b041cb40eb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e5ef91fb27dd684a27ae7f1993cfba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d4aca03910382accfe738520daf689c.png)
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【推荐3】在意大利,有一座满是“斗笠”的灰白小镇阿尔贝罗贝洛,这些圆锥形屋顶的奇特小屋名叫Trullon,于1996年故入世界文化遗产名景(如图1).现测量一个屋顶,得到圆锥SO的底面直径AB长为
m,母线SA长为
m(如图2).C是母线SA的一个三等分点(靠近点S).
![](https://img.xkw.com/dksih/QBM/2021/12/2/2864061429932032/2866004458340352/STEM/2e86ae3f20424260aca6617a2ae7cb92.png?resizew=483)
(1)现用鲜花铺设屋顶,如果每平方米大约需要鲜花60朵,那么装饰这个屋顶(不含底面)大约需要多少朵鲜花(此处π取3.14,结果精确到个位):
(2)从点A到点C绕屋顶侧面一周安装灯光带,求灯光带的最小长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da45c443af7994a26ffa9d8894e7262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b837fd9c52f60bfb3b6852733abc790.png)
![](https://img.xkw.com/dksih/QBM/2021/12/2/2864061429932032/2866004458340352/STEM/2e86ae3f20424260aca6617a2ae7cb92.png?resizew=483)
(1)现用鲜花铺设屋顶,如果每平方米大约需要鲜花60朵,那么装饰这个屋顶(不含底面)大约需要多少朵鲜花(此处π取3.14,结果精确到个位):
(2)从点A到点C绕屋顶侧面一周安装灯光带,求灯光带的最小长度.
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解答题-证明题
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适中
(0.65)
【推荐1】在矩形
中,AB=4,AD=2.点
分别在
上,且AE=2,CF=1.沿
将四边形
翻折至四边形
,点
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/1/4115fbbd-04cb-4551-9270-cb6e465c5275.png?resizew=396)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ba89e83329983cfadbfcdda151aaa3.png)
平面
;
(2)求异面直线
与
所成的角;
(3)在翻折的过程中,设二面角
的平面角为
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c4cd264c97c1f261229925cc5a6761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/946c16d99496d31ce4d87301a4793393.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c76e6c67644b8bad9bfe11c7ec3081d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7829855159327b2a87c3a424b3f7134a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a28d6477c85c5a4ac410a884e92fbe53.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/1/4115fbbd-04cb-4551-9270-cb6e465c5275.png?resizew=396)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ba89e83329983cfadbfcdda151aaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b12cffc313a181f666e3fc8e66b6f59.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b435d7fc33860ae191f9111d880b40.png)
(3)在翻折的过程中,设二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1b43ff5a9a70210b4017c4c38b4258c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43660b1543b3a2b46185f7629d28a963.png)
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【推荐2】如图,在三棱锥
中,
,点
为边
的中点.
![](https://img.xkw.com/dksih/QBM/2018/5/20/1949509722202112/1950007022395392/STEM/d610dc80-515f-43ea-9e4e-df3d4c8fc1b9.png?resizew=216)
(Ⅰ)证明:平面
平面
;
(Ⅱ)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c839b6c777729a1d2e9bb3506995830d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2018/5/20/1949509722202112/1950007022395392/STEM/d610dc80-515f-43ea-9e4e-df3d4c8fc1b9.png?resizew=216)
(Ⅰ)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0fe22d526d1da4d61436c59e7517328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(Ⅱ)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e86703dc78c1f23b00362d492ee176b1.png)
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【推荐3】如图,在四棱锥P-ABCD中,底面ABCD为平行四边形,
为等边三角形,平面
平面PCD,
,
,AD=5,棱PC的中点为N,连接DN.
(1)求证:
平面PCD;
(2)求直线AD与平面PAC所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177678001b2ccde1db8f57fa5e017002.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b44f4120c94cb7176dc31fcac387b32e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/28/a6ce13a4-70b8-4580-bdc3-a83804272902.png?resizew=194)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
(2)求直线AD与平面PAC所成角的正弦值.
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解题方法
【推荐1】如图,在直三棱柱
中,底面ABC是等边三角形,D为BC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/15/c870f1ab-3daa-406d-a18c-1a6a7f173d2f.png?resizew=160)
(1)求证:
平面
;
(2)若
,求点A到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/15/c870f1ab-3daa-406d-a18c-1a6a7f173d2f.png?resizew=160)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/554923047631d16320c2ba39abeee99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b2213b575a7cfaffcdf91885005c7d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92105835f8075cb75dff244e908370b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41b43d280eca53ee6a3661bebb6d23a0.png)
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
【推荐2】如图,在四棱锥
中,
为等边三角形,平面
平面
,四边形
是高为
的等腰梯形,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2016/8/17/1572981128044544/1572981262655488/STEM/4c8e3526fde04c8ea0d630b3dcc77246.png)
(1)求证:
;
(2)求
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c38b4f2a97f7ed95473d864f5c2accf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/425e79e4e7c13e2ea8ae3d4f8d31ac33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4d2956faa9fea992d3b68e10bd8bfea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa049fadd0ce35fa7ae25e02112afef9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a03952d664fba91020fc5f3bcf2f9746.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e501b69b1da5d5fc0a30581088af0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/2016/8/17/1572981128044544/1572981262655488/STEM/4c8e3526fde04c8ea0d630b3dcc77246.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b8f4790cfa8693b4901edb1a49c4d2c.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
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解题方法
【推荐1】如图,在三棱锥
中,
,
,
,
.
平面
;
(2)若
,
,求二面角
的平面角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c646c683fbe522edb7ea54fd3ad873d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc51db970e3290c359881c7924a1c16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bcbf1197b6a9e629dbd76ba6b8fbd81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89b336e518ac4ff04c6c26e4b8a15844.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d294d69caac577339f11f477b2047e.png)
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【推荐2】已知几何体
中,
,
,
,
面
,
,
.
(1)求证:平面
平面
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ccbe7b7e304f13142684268baa477d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9060f03b9ee41d70d135b1e1a8902ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d480065b5cc19c58bc2333a559711fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08d8cac59493b3c6d1a84040f882a47b.png)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15f3e3f310f6ec3f3a26498e7ee17a00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2977ae4bfa32de8c6f0fb136205c4fe7.png)
![](https://img.xkw.com/dksih/QBM/2020/8/15/2528240295264256/2531127758446592/STEM/50427c6a6a7347d0b79839333c28cac7.png?resizew=192)
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