知正方体
中,
、
分别为对角线
、
上的点,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c525e70f9f3d864840080804ae96819d.png)
平面
;
(2)若
是
上的点,
的值为多少时,能使平面
平面
?请给出证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e539f26ed5e0b20ff7220559324869a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c525e70f9f3d864840080804ae96819d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72221ee5b504d596ff799c0b356aa0ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4da530384dd04ac90a025385e8b3c2f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/943d6e170279d007a4c943f684b1c3c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e8fd9020ac4827433593c1e3d503a30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4da530384dd04ac90a025385e8b3c2f.png)
23-24高一下·湖南邵阳·期中 查看更多[3]
湖南省邵阳市第二中学2023-2024学年高一下学期4月期中数学试题(已下线)11.3.3 平面与平面平行-【帮课堂】(人教B版2019必修第四册)(已下线)第六章立体几何初步章末二十种常考题型归类(2)-【帮课堂】(北师大版2019必修第二册)
更新时间:2024-05-04 15:25:35
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图1,在梯形ABCD中,
,
,
,过A,B分别作CD的垂线,垂足分别为E,F,已知
,
,将梯形ABCD沿AE,BF同侧折起,使得平面
平面ABFE,平面
平面BCF,得到图2.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/9ddce68d-b2a1-4fe9-9cf3-51bda93d81de.png?resizew=319)
(1)证明:
平面ACD;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca7e1a727ba332984ad857b3d25344d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82773737609e65dea3c5c67099f1b10d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86338536656046e93b53672ade9a78b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d782bc4aad7cf35baa3de7b8ea73e41f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/9ddce68d-b2a1-4fe9-9cf3-51bda93d81de.png?resizew=319)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c372d059202ec388960b125d4a87dc84.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c83d44cb6b68e558952d40b2f1de15.png)
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【推荐2】如图所示,四棱锥
中,
底面
,
,
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/441a8718-e87a-4dc5-9550-94f9cd8ee862.png?resizew=171)
(1)求证:
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c83f8945042b9c8fb2fbdac9308d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af260e0d98c95d1e092dc4c6d348e3ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59567dbf014b5608475254efb2cf2c0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56ee81929c987732fcb379802eeef7a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1804c3641953c30ccf750504eff6577.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b40d0d2f3cdd8981bb792ad87efb42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/441a8718-e87a-4dc5-9550-94f9cd8ee862.png?resizew=171)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08f8b463fcecf0a757f386db56e074d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d923a338dd2d2e29336b42574d38448.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/defa5b53043ae802bb1af7d14374406d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21665d21bbfb04410c78345de1fd15ae.png)
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【推荐3】如图,正方形AMDE的边长为2,B,C分别为AM,MD的中点.在五棱锥
中,F为棱PE的中点,平面ABF与棱PD,PC分别交于点G,H,设面PAB与面PDE的交线为l.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/6/12ef99cd-dd2a-49c9-98aa-fcb5bf36c2cd.png?resizew=148)
(1)求证:
面FGH;
(2)若
底面ABCDE,且
,求直线BC与平面ABF所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be89b9d1709d7974a108142c5fa2ccec.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/6/12ef99cd-dd2a-49c9-98aa-fcb5bf36c2cd.png?resizew=148)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93a4afe69e9ee3c701f1f109c3a0a7d4.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66b1a3078dc4803bd5e16833ddd459e0.png)
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解题方法
【推荐1】如图1,等腰
中,
,
,点
,
,
为线段
的四等分点,且
.现沿
,
,
折叠成图2所示的几何体,使
.
平面
;
(2)求几何体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e1872c9deda8f87faa24f7e77f85fbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce2571f1ec5bf937fe74664a1944d48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac5e1093a147c521c5e8d0d5e266db54.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3a346479ae8f643dd18f385648d0600.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ec435aa1401dbce7863b531bf2f3e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31c34b18525831f3eda7bb90be0199b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17817b7552fd396b8432f9fb3ea1efbb.png)
(2)求几何体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9400174e3b54a5838dd99fa9b96ec134.png)
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【推荐2】如图,梯形
中,
,垂 足为点
. 将
沿
折起,使得点
到点
的位放,且
,连接
分别为
和
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/18/4c318440-8876-423b-a468-5bf7781afa95.png?resizew=495)
(1)证明:
平面
;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03d5e96f0e182faf25ab977905bddb68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c771a4feb150ad9cff8d70431c97eb17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377240724a516ade73c383c5d13c65ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c0fd6592f6ac9781a7660d6ebea47ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/18/4c318440-8876-423b-a468-5bf7781afa95.png?resizew=495)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/425bb0d1c21eb4448dbbe9a41efa7538.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f5ff76d62b0ce60fd66fce91b737515.png)
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【推荐1】在正方体AC1中,E,F分别为D1C1,B1C1的中点,AC∩BD=P,A1C1∩EF=Q,如图.
(2)线段AC上是否存在点M,使得平面B1D1M∥平面EFBD,若存在确定M的位置,若不存在说明理由.
(2)线段AC上是否存在点M,使得平面B1D1M∥平面EFBD,若存在确定M的位置,若不存在说明理由.
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【推荐2】如图,正三棱柱
的高为
,底面边长为2,点
,
分别为
,
上的点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/c9977925-063e-42a0-aaf0-977fdec4f696.png?resizew=155)
(Ⅰ)在棱
,
上是否存在点
,
使得平面
平面
?请说明理由;
(Ⅱ)在(Ⅰ)的条件下,求几何体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/c9977925-063e-42a0-aaf0-977fdec4f696.png?resizew=155)
(Ⅰ)在棱
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bf345b86a78e5d8eba3bde4bae43774.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae7f4612c548b1f72a964ddb291cd2e.png)
(Ⅱ)在(Ⅰ)的条件下,求几何体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67c4d2eab70f25f919044156604b1597.png)
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