解题方法
1 . 如图,在四棱锥
中,
底面
,底面
为直角梯形,
,
,
,点
分别为线段
的中点.
![](https://img.xkw.com/dksih/QBM/2020/5/6/2457127220862976/2458168090861568/STEM/4073303742a3406c8df0a05f935489a7.png?resizew=225)
(1)证明:直线
平面
.
(2)求多面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5acb763021bf166ca719d07223591d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53f650a167515ec959bcc93e927bd981.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f335994a0c362bc3ddd6fa9142e9b7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15e932aab78c6f4f7a6f2de6a8d5dda5.png)
![](https://img.xkw.com/dksih/QBM/2020/5/6/2457127220862976/2458168090861568/STEM/4073303742a3406c8df0a05f935489a7.png?resizew=225)
(1)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/331da51a299acaaafa61551d0ebd3e79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d246f9eceab371ebf47a47c2f11a4ad.png)
(2)求多面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/340217128adcd3fc30659929fd322e43.png)
您最近一年使用:0次
2020·全国·模拟预测
2 . 如图,四边形
中
是等腰直角三角形,
,
是边长为2的正三角形,以
为折痕,将
向上折叠到
的位置,使点
在平面
内的射影在
上,再将
向下折叠到
的位置,使平面
平面
,形成几何体
.
![](https://img.xkw.com/dksih/QBM/2021/1/12/2634689496850432/2635397828755456/STEM/33ace837fb244acf8e3494f718656ea0.png?resizew=337)
(1)点
在
上,若
平面
,求点
的位置;
(2)求直线
与平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1613c53d8e5f8161b92727232e67b662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c40c49d6e2fc6fbdc21ff61841b586a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c40c49d6e2fc6fbdc21ff61841b586a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/644f63756fe9251e65cc14e1ce9723d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c40c49d6e2fc6fbdc21ff61841b586a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a313fa9db2c50907e7341b07cdde8021.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/677d1863ff4d8ac1604b18149d4f320f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebd53169fbc871e8732fd8040a926943.png)
![](https://img.xkw.com/dksih/QBM/2021/1/12/2634689496850432/2635397828755456/STEM/33ace837fb244acf8e3494f718656ea0.png?resizew=337)
(1)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a2b5cfae407016cad45bbdefea05833.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca48c18021e7be4bbb3e95576e1c1b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8257b6bd25104e07b9ad935c0a3aac4.png)
您最近一年使用:0次
2022高三·全国·专题练习
解题方法
3 . 如图,在三棱锥
中,
底面
,
是正三角形,
是棱
的中点,如
,在平面
内寻找一点
使得
平面
,并说明理由
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.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/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1364213f546b37f8764ddcb59e36ae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9d32e76582bf550593fdef53e081225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf12905647aeeded72bbca21a63f319.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/28c96354-b0a9-4de6-9e85-d3d0be0db6ce.png?resizew=203)
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2018高三·全国·专题练习
解题方法
4 . 如图,四棱锥
的底面为等腰梯形,
且
,点
为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/a3b3e1c1-967a-4e61-b7f1-179b92c9d999.png?resizew=191)
(1)证明:
平面
;
(2)若
平面
,直线
与平面
所成角的正切值为
,求四棱锥
的体积
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70801d43498c8ae772b960f0353131f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/a3b3e1c1-967a-4e61-b7f1-179b92c9d999.png?resizew=191)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063510e3c1fb6a7ccc3b8e3e3c7d660e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fef11ab6a88f262ed2ea0efd76d8a10b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
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17-18高一·全国·课后作业
5 . 如图,在长方体ABCD-A1B1C1D1中,E是BC上一点,M,N分别是AE,CD1的中点,AD=AA1=a,AB=2a,求证:MN∥平面ADD1A1.
![](https://img.xkw.com/dksih/QBM/2018/11/8/2070969054011392/2076017732132865/STEM/30c860ad5c1946368667df8e0bde1ddb.png?resizew=106)
您最近一年使用:0次
解题方法
6 . 如图,正三棱柱
的所有棱长都为
,
是
的中点,
在
边上,
.
平面
;
(2)若
是侧面
内的动点,且
平面
.
①在答题卡中作出点
的轨迹,并说明轨迹的形状(不需要说明理由);
②求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43c4e9f1f1ca97f64b074bb639d06f08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f7d9ac3c0e60f1419dc90a37ff731b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a935b7d21a103a264b6e96ecf82dbe4a.png)
①在答题卡中作出点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
②求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ad5bd63dd78b87930287942c54ed497.png)
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名校
解题方法
7 . 如图所示,
为平行四边形
所在平面外一点,
分别为
的中点,平面
平面
.
![](https://img.xkw.com/dksih/QBM/2017/5/10/1684074014965760/1689882530930688/STEM/97509fd7274645bfbea343df3711917d.png?resizew=225)
(1)判断
与
的位置关系,并证明你的结论;
(2)判断
与平面
的位置关系,并证明你的结论.
![](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/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fbb19cb4eb2d7f3207559eb07355ba2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c659d2ab07b9b66ed9a60cb604dd9aa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3e61111c1e9b98b79615f75540175c9.png)
![](https://img.xkw.com/dksih/QBM/2017/5/10/1684074014965760/1689882530930688/STEM/97509fd7274645bfbea343df3711917d.png?resizew=225)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
您最近一年使用:0次
2017-05-18更新
|
546次组卷
|
2卷引用:河北省张家口市第一中学2016-2017学年高一下学期期中考试(衔接班)数学(理)试题
2020高三下·全国·专题练习
解题方法
8 . 如图,四棱锥S-ABCD中,SD⊥平面ABCD,AB∥CD,AD⊥CD,SD=CD,AB=AD=2,CD=2AD,M是BC的中点,N是SA的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/c6a43924-1629-4dcf-b16b-dc351d742cf8.png?resizew=144)
(1)求证:MN∥平面SDC;
(2)求点A到平面MDN的距离.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/c6a43924-1629-4dcf-b16b-dc351d742cf8.png?resizew=144)
(1)求证:MN∥平面SDC;
(2)求点A到平面MDN的距离.
您最近一年使用:0次
解题方法
9 . 如图,平面
平面
,四边形
为直角梯形,
,四边形
为等腰梯形,
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/9/c7976795-c781-4ab1-ac68-eac0192126cc.png?resizew=173)
(1)若梯形
内有一点
,使得
平面
,求点
的轨迹;
(2)求平面
与平面
所成的锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c674dc5024374f53920947c4cf4baf11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d861af475ba1715789c1b811f81b3b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/607cf996a966b2682d50dec151ac1a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d861af475ba1715789c1b811f81b3b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e2550fca125b1f9e31f65701e4d0637.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91ad35692f2707b24509ffa790f79896.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/9/c7976795-c781-4ab1-ac68-eac0192126cc.png?resizew=173)
(1)若梯形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d861af475ba1715789c1b811f81b3b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f60d66204e1abc17bd01749f187f8050.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9186e4574ffe28e673724fcb019db208.png)
您最近一年使用:0次
2021高三下·全国·专题练习
10 . 如图,在棱长为2的正方体
中,
,
,
,
分别为
,
,
,
的中点,点
为线段
上的动点,且
(
).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/5bcdb284-5a76-448b-89fe-64e166ac17d9.png?resizew=154)
(1)若
为线段
的中点,求证:
平面
;
(2)是否存在
,使得二面角
的余弦值的绝对值为
?若存在,请求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0354c8e3cb0c61402811d41d466a4ff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd3ede869e508a8c8bda34a16782f863.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/5bcdb284-5a76-448b-89fe-64e166ac17d9.png?resizew=154)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5311bb2a8564c3ff0d683d443633f746.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
(2)是否存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd16e4d561eac22285a01e2453f4a8f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c1dcde204f06aed61dd2aa5eac5a642.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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