如图,在四棱锥
中,四边形
为梯形,
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fa6ea683971fa8b6299d7aab6d04092.png)
![](https://img.xkw.com/dksih/QBM/2021/2/24/2664966744375296/2667903068569600/STEM/3b3aa1f7-fe3f-4a56-aa68-13b677441e73.png)
(1)若
为
中点,证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f35614aff055b98b76ca262f64e629d.png)
(2)若点
在面
上投影在线段
上,
,证明:
面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4117625867a74cd022584500c76deca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5abdaf8d1ee53421609eced7e67b34fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5acb763021bf166ca719d07223591d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fa6ea683971fa8b6299d7aab6d04092.png)
![](https://img.xkw.com/dksih/QBM/2021/2/24/2664966744375296/2667903068569600/STEM/3b3aa1f7-fe3f-4a56-aa68-13b677441e73.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f35614aff055b98b76ca262f64e629d.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb304d905125170bebfada27e7ed8960.png)
20-21高二上·安徽芜湖·期末 查看更多[8]
安徽省芜湖市2020-2021学年高二上学期期末文科数学试题(已下线)专题29 立体几何(解答题)-2021年高考数学(文)二轮复习热点题型精选精练(已下线)专题8.6 第八章《立体几何初步》单元测试(B卷提升篇)-2020-2021学年高一数学必修第二册同步单元AB卷(新教材人教A版,浙江专用)(已下线)考点突破08 立体几何初步-备战2022年高考数学一轮复习培优提升精炼(新高考地区专用)广东省深圳市南方科技大学附属中学2020-2021学年高一下学期期中数学试题(已下线)第八章 立体几何初步单元自测卷(一)(已下线)期末考测试(基础)-2021-2022学年高一数学一隅三反系列(人教A版2019必修第二册)(已下线)第07讲 立体几何大题(11个必刷考点)-《考点·题型·密卷》
更新时间:2021-02-28 18:05:35
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相似题推荐
解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】如图,
为圆
的直径,点
、
在圆
上,且
,矩形
所在的平面和圆
所在的平面互相垂直,且
,
.
![](https://img.xkw.com/dksih/QBM/2016/6/22/1572773387493376/1572773393735680/STEM/af2d94e89d374f5a8655263a45062b0b.png?resizew=237)
(1)求证:
平面
;
(2)设
的中点为M,求证:
平面DAF;
(3)设平面
将几何体
分成的两个锥体的体积分别为
,
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c91baecb97fadd4f8ab49e6effcbc04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a951292add4574c1debd16800674e1e.png)
![](https://img.xkw.com/dksih/QBM/2016/6/22/1572773387493376/1572773393735680/STEM/af2d94e89d374f5a8655263a45062b0b.png?resizew=237)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a22d6b860f06fe23618b0d3de6768fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/603c7e98deecdba0cf3773757a9b8304.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280247d7df395bb9ea78c51e67b458d2.png)
(3)设平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/603c7e98deecdba0cf3773757a9b8304.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d78d008923973b0529d4f7c9f1a2717.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbd2471a8a3795689cb5fbe321270d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c29dc66903536fc8aa9442a8187b85b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d88f653fd6ec2262cd7b6c482f54d8c.png)
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解题方法
【推荐2】如图,四棱锥
,平面
平面
,
,
,
,
,
,E为PC中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/27/f62c8484-4656-4573-a25d-4fc4b204b68b.png?resizew=200)
(1)求证:直线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
平面PAD;
(2)平面
平面PDC.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbb05b8b630052ff544249ebd72d95d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b377f22aafd3742ad860f77abaacef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f6967901d6c855864df01e7bf7a15c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a69df64811eb0866c84207f24dfae99.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/27/f62c8484-4656-4573-a25d-4fc4b204b68b.png?resizew=200)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
(2)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a3fd5284e160896f07ce367645fd04.png)
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【推荐1】如图,OP为圆锥的高,AB为底面圆O的直径,C为圆O上一点,并且
,E为劣弧
上的一点,且
,
.
![](https://img.xkw.com/dksih/QBM/2022/1/20/2898406287622144/2921122690719744/STEM/d5912f6d-85e2-4cbb-a47e-7df837b921e0.png?resizew=192)
(1)若E为劣弧
的中点,求证:
平面POE;
(2)若E为劣弧
的三等分点(靠近点
),求平面PEO与平面PEB的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2076ab9281325aedd252b9b5e70037b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed41d321f4c0717ac5b443aad942d9a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/637331a6bcf269d7d3487ee4cfb536f9.png)
![](https://img.xkw.com/dksih/QBM/2022/1/20/2898406287622144/2921122690719744/STEM/d5912f6d-85e2-4cbb-a47e-7df837b921e0.png?resizew=192)
(1)若E为劣弧
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed41d321f4c0717ac5b443aad942d9a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
(2)若E为劣弧
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed41d321f4c0717ac5b443aad942d9a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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【推荐2】如图,正方形
所在平面与等腰三角形
所在平面相交于
,
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/14/99f9f152-10b8-4a63-af33-ff92f5ac649f.png?resizew=214)
(I)求证:
平面
;
(II)在线段
上存在点M,使得直线AM与平面
所成角的正弦值为
,试确定点M的位置.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2194add18a7df1a23cf1554dc2da1b40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/14/99f9f152-10b8-4a63-af33-ff92f5ac649f.png?resizew=214)
(I)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(II)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2194add18a7df1a23cf1554dc2da1b40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
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【推荐3】如图,三棱柱ABC-A1B1C1中,底面ABC为等边三角形,E,F分别为AB,AA1的中点,CE⊥FB1,AB=
AA1=
EB1.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/6cbcf21b-22b3-4b48-b196-e84a6d59260b.png?resizew=120)
(1)证明:EF⊥平面CEB1;
(2)求直线EF与平面CFB1所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18483c9c195ecd922772527fa85c0fcb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/6cbcf21b-22b3-4b48-b196-e84a6d59260b.png?resizew=120)
(1)证明:EF⊥平面CEB1;
(2)求直线EF与平面CFB1所成角的大小.
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