如图,已知圆柱
的底面半径为1,正△ABC内接于圆柱的下底面圆O,点
是圆柱的上底面的圆心,线段
是圆柱的母线.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/5413c7a3-6cd4-4a5e-ac0c-fd123a7e537d.png?resizew=165)
(1)求点C到平面
的距离;
(2)在劣弧
上是否存在一点D,满足
平面
?若存在,求出∠BOD的大小;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192f4f9446c954a291f779d963f90257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/5413c7a3-6cd4-4a5e-ac0c-fd123a7e537d.png?resizew=165)
(1)求点C到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc9ffc43a56921fe79f8602636b8b0f.png)
(2)在劣弧
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed41d321f4c0717ac5b443aad942d9a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e14379c3ec53ceaee8ceef6c16edd150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc9ffc43a56921fe79f8602636b8b0f.png)
2023·上海闵行·一模 查看更多[2]
更新时间:2022-12-15 10:07:03
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相似题推荐
解答题-证明题
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适中
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【推荐1】如图,四棱锥P﹣ABCD的底面是菱形,∠ABC=60°,PA⊥底面ABCD,E,F分别是BC,PC的中点,点H在PD上,且EH⊥PD,PA=AB=2.
(1)求证:EH∥平面PBA;
(2)求三棱锥P﹣AFH的体积.
(1)求证:EH∥平面PBA;
(2)求三棱锥P﹣AFH的体积.
![](https://img.xkw.com/dksih/QBM/2014/7/25/1571827971416064/1571827976650752/STEM/b3b24b54e84146328202252c09ca8a29.png)
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【推荐2】如图几何体中,底面
为正方形,
平面
,
.且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/40dab380-2862-43ae-a7c5-a5e89541d136.png?resizew=154)
(1)求证:
平面
;
(2)求
与平面
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/b73f874048f9e48ae35ee95bbf443bce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9a6e07a3ef8f3969afb82f91e6ae4ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/40dab380-2862-43ae-a7c5-a5e89541d136.png?resizew=154)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7175df06e33cad4e6bbc3f2f6b0a2986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/564376a88fa74090de9f7694226a6184.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
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【推荐3】如图,已知三棱柱
的侧棱与底面垂直,
,
、
分别是
、
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/aeba1a6b-e38c-40cc-a4b8-885e34d984d5.png?resizew=150)
(1)证明:
;
(2)判断直线
和平面
的位置关系,并加以证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8e9ec412ea0355e4e5cd06c60e5fee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/aeba1a6b-e38c-40cc-a4b8-885e34d984d5.png?resizew=150)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e98e7edbeab52b0aa5d66396ca46124.png)
(2)判断直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
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【推荐1】如图,在
中,
为
中点,过点
作
垂直
于
,将
沿
翻折,使得面
面
,点
是棱
上一点,且
面
.
(1)求
的值;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44c1dbe508520f3681e2b0c7324ff909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f369bec2d5682bf6b8b317a08aff546.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/5/96fb6c52-010d-46f3-8a92-b66d3070d252.png?resizew=266)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44f6039eb12b502683fa787718600206.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f9c7940d6f1ede201fd27d5d9e0650d.png)
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解题方法
【推荐2】已知底面边长和斜高长均为2的正四棱锥被平行于底面的平面所截得的正棱台为
,且满足
.
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea9dcbb4a05aa3b0cf780baa4489556e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b54387f870ae37f7951b253665d64f6.png)
(2)求棱台的体积
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
您最近一年使用:0次
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【推荐1】正三棱柱
底边长为2,E,F分别为
,AB的中点.
![](https://img.xkw.com/dksih/QBM/2022/1/31/2906233640329216/2909395287867392/STEM/557c5364-1318-402a-a3a2-991628f806ea.png?resizew=184)
(1)求证:平面
平面
;
(2)若
与平面
所成的角的正弦值为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/2022/1/31/2906233640329216/2909395287867392/STEM/557c5364-1318-402a-a3a2-991628f806ea.png?resizew=184)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de45d2433de1eedd376a3c10816e0d0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8035fc825a001d7d9a3dacd8271662.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce1b066f8869d0ff4513f7a99745125.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8b959c2e73565b18f96256c3161e19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
您最近一年使用:0次
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【推荐2】如图,四棱锥
的底面
为菱形,
平面
,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339434496/STEM/d4b70d65dbbe44de9f7a893213cdd283.png?resizew=195)
(1)求证:
平面
;
(2)求平面
与平面
所成的锐二面角大小的余弦值.
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339434496/STEM/7aeeeea419524b81bd08d5030d138b1b.png?resizew=75)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339434496/STEM/8494a15d33344f179236996c5fb37003.png?resizew=48)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339434496/STEM/4153218c7289459b9c3c9987cba135e5.png?resizew=41)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339434496/STEM/8494a15d33344f179236996c5fb37003.png?resizew=48)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339434496/STEM/aedacf6d0a9f4964b9d57a038601d1b7.png?resizew=91)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339434496/STEM/cdfbca9224ab43818a3b25c3792340e5.png?resizew=87)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339434496/STEM/1035a0faeb71458aa61575ba4ea0fa06.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339434496/STEM/4cd34efb6d0e4038b82bf370292d519a.png?resizew=27)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339434496/STEM/d4b70d65dbbe44de9f7a893213cdd283.png?resizew=195)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339434496/STEM/6810b7f8d0ad4e55b9aabcd3c1045ab6.png?resizew=41)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339434496/STEM/dae257387559421f9874386933dadde1.png?resizew=37)
(2)求平面
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339434496/STEM/dae257387559421f9874386933dadde1.png?resizew=37)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572106333437952/1572106339434496/STEM/9b420c86eff64960b84bbe8eef7b4e0c.png?resizew=37)
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【推荐1】如图,已知点
是直角梯形
所在平面外一点,
平面
,
,
,
,
,
于
,
.
![](https://img.xkw.com/dksih/QBM/2011/4/12/1570116231233536/1570116236517376/STEM/f3a922eebd5b443081802e2dfee05643.png?resizew=292)
(1)求证:
;
(2)求直线
与平面
所成的角;
(3)求
点到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6037bba27008abc96a6dba99753549ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829018a6ca0aff95d89e3f7cd943274e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/304e9d63e7fdc531f4f7b805b765a1b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc076faa57e8dd9cf081462fd4fa70e0.png)
![](https://img.xkw.com/dksih/QBM/2011/4/12/1570116231233536/1570116236517376/STEM/f3a922eebd5b443081802e2dfee05643.png?resizew=292)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a03d3b1a7b201f380f960db4b6ff2943.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
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解题方法
【推荐2】如图,在三棱锥
中,
平面ABC,平面
平面PBC,
,
.
![](https://img.xkw.com/dksih/QBM/2020/5/19/2466047939067904/2466331531091968/STEM/54d473eec53f4ff18bcab22d10dbe7b1.png?resizew=174)
(1)证明:
平面PBC;
(2)求点C到平面PBA的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45fbffb9e2c7fa7c5006cde8da0cabe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fced2959882ccc7559584d862f8343c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca036d049f5205cf04cb1b9c5cd03f97.png)
![](https://img.xkw.com/dksih/QBM/2020/5/19/2466047939067904/2466331531091968/STEM/54d473eec53f4ff18bcab22d10dbe7b1.png?resizew=174)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
(2)求点C到平面PBA的距离.
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