如图,在三棱柱
中,
平面ABC,D,E,F分别为
,
,
的中点,
,
.
![](https://img.xkw.com/dksih/QBM/2022/5/27/2988485271306240/2992238065442816/STEM/10e0e91f25d040908def4f07bec990b8.png?resizew=174)
(1)求证:
平面BEF;
(2)求点D与平面
的距离;
(3)求二面角
的正切值;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8bfe2553e852df73185d017c0a62fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1efa2b0018617bd579875185dafca39a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c9d5815dc775d5a5810fff0b016a8d5.png)
![](https://img.xkw.com/dksih/QBM/2022/5/27/2988485271306240/2992238065442816/STEM/10e0e91f25d040908def4f07bec990b8.png?resizew=174)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
(2)求点D与平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bba99277e38f8d9f817a9d7db8198219.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e59b1f7689bff6644bfdeb9e36feb163.png)
21-22高一下·河南商丘·阶段练习 查看更多[2]
河南省商丘市第一高级中学2021-2022学年高一下学期五月月考数学试卷(已下线)第02讲 玩转立体几何中的角度、体积、距离问题-2022年暑假高一升高二数学衔接知识自学讲义(人教A版2019)
更新时间:2022-06-01 23:46:50
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相似题推荐
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐1】如图,四棱锥
中,四边形
为梯形,其中![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
,
.
(1)证明:平面
平面
;
(2)若
,点
满足
,且三棱锥
的体积为
,求平面
与平面
的夹角的余弦值.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b99140d45ccbc57ea06fe12da00ab32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7846994f99d5b8e7b2dcd3d1dbc9696.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/14/32b30e78-f8e1-41ed-8874-650463439944.png?resizew=160)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04c222223dae9ef27d4c132534d9848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32d0710321d97361e5782124bbf7f0c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46373b749211e2eb67d1b653b6087856.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52753d89bf58589e2e83b19bd3d140b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f83dbfddc6f98548699ed581e8c8608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
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解答题-证明题
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解题方法
【推荐2】如图,在四棱锥P-ABCD中,底面是直角梯形ABCD,其中AD⊥AB,CD
AB,AB=4,CD=2,侧面PAD是边长为2的等边三角形,且与底面ABCD垂直,E为PA的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/1/e0c661b6-9781-46de-aa86-307a99b2d7e5.png?resizew=187)
(Ⅰ)求证:DE
平面PBC;
(Ⅱ)求三棱锥A-PBC的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/1/e0c661b6-9781-46de-aa86-307a99b2d7e5.png?resizew=187)
(Ⅰ)求证:DE
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
(Ⅱ)求三棱锥A-PBC的体积.
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解答题-问答题
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【推荐1】如图,在四棱锥
中,底面
为正方形,侧面
是正三角形,平面
平面
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/2021/9/14/2808013424353280/2815911933911040/STEM/6b6b069216dc4e65906666b1300648dd.png?resizew=214)
(1)证明:
平面
;
(2)求二面角
的正弦值.
![](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/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/2021/9/14/2808013424353280/2815911933911040/STEM/6b6b069216dc4e65906666b1300648dd.png?resizew=214)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0edb1508fc95765f3bb316bcb5252d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b796bbaeb8450404c2d146283562006e.png)
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【推荐2】如图,
为
所在平面外一点,
平面
,
,
于
,
于
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/349177e1-5896-4d30-a8b0-64f30a14ac3a.png?resizew=166)
求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2f39d3fcb1664705228e683c2cc3b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbfbaf73297240eb116f22489519895a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f392902d611863c6908a48e696e7bd8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/349177e1-5896-4d30-a8b0-64f30a14ac3a.png?resizew=166)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b7b9bf7332256ac478041957fa2a55a.png)
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【推荐1】图1是由
和
组成的一个平面图形,其中PA是
的高,
,
,
,将
和
分别沿着PA,PC折起,使得
与
重合于点B,G为PC的中点,如图2.
![](https://img.xkw.com/dksih/QBM/2022/3/8/2931935074689024/2933763217940480/STEM/fa28453e-663b-4de2-a72b-4b30a8fd2ebc.png?resizew=313)
(1)求证:PA⊥BC;
(2)若
,求三棱锥C-ABG的高.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f9e624b7eca5d114c725006de096d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52efb84ddffd44c0b6c29da9364ac2c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f9e624b7eca5d114c725006de096d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c204caddc19635ae6232afe50ac13197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fb9e14b9bfe4581cd1b3301dcbb4ece.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4fc2d383876afe5be1103352571805b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15eaf4e85780cbef2850932474e649b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52efb84ddffd44c0b6c29da9364ac2c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a71fc9c0068109dad1382354570665.png)
![](https://img.xkw.com/dksih/QBM/2022/3/8/2931935074689024/2933763217940480/STEM/fa28453e-663b-4de2-a72b-4b30a8fd2ebc.png?resizew=313)
(1)求证:PA⊥BC;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b4809b02f477ba2663c3dc245147940.png)
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【推荐2】如图,圆锥PO中,AB是圆O的直径,且AB=4,C是底面圆O上一点,且AC=2
,点D为半径OB的中点,连接PD.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/3d30673d-fc8f-4d27-895d-a28bb7db270e.png?resizew=186)
(1)求证:PC在平面APB内的射影是PD;
(2)若PA=4,求底面圆心O到平面PBC的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/3d30673d-fc8f-4d27-895d-a28bb7db270e.png?resizew=186)
(1)求证:PC在平面APB内的射影是PD;
(2)若PA=4,求底面圆心O到平面PBC的距离.
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【推荐1】如图,矩形ABCD和梯形BEFC所在平面互相垂直.,
,
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/bdb70809-2e66-4917-ba6d-435a8ac3fe18.png?resizew=234)
(1)求证:
平面ABE;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9b982b39daa460d2112e4162190632c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d44a9f558aba8007921980a0c89f126.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d783fe7f3ce673d5d21281174e7a7968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ce84f6062f12bf6ef42d7b733cd2248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeedb5f361a1baff6338436fff6c471d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/bdb70809-2e66-4917-ba6d-435a8ac3fe18.png?resizew=234)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a2b5cfae407016cad45bbdefea05833.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0f1592b2ad60fa438c2564ff651231f.png)
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【推荐2】如图,在三棱锥
中,
和
均是边长为6的等边三角形,P是棱
上的点,
,过点P的平面
与直线
垂直,且平面
平面
.过直线l及点C的平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/3/aa110b0c-8325-43fa-8b00-1be7821a8028.png?resizew=182)
(1)在图中画出l,写出画法(不必说明理由);
(2)求证:
;
(3)若直线
与平面
所成角的大小为
,求平面
与平面
所成的锐二面角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a94d59dee2d5a8f0425b64b2083825.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f63075fdeeb9e765dd696c4ff43ba1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd4fce8e923062b9779553d6f282895b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb1319a44dc601303876d3dab3372660.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a392d05d3cfcbb438569b1ea9980dc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/670684ed4962fcebce7b5a140510d066.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/863dd235346ce076540230e8eb4122f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/138ca330a165c68e865cacd35c18a665.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cec6c3f8d8a0611bf49e269bd288949d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/3/aa110b0c-8325-43fa-8b00-1be7821a8028.png?resizew=182)
(1)在图中画出l,写出画法(不必说明理由);
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23a63f6aa604e3d7fc7ae8c7b587069a.png)
(3)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a392d05d3cfcbb438569b1ea9980dc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1902d864d3f16535e273f7851b92a4fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
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