1 . 如图在四棱锥
中,底面
是菱形,
,平面
平面
,
,
为
的中点,
是棱
上一点,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc47768bee81ee0c6fbc41e3fdeb22cc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/2b114aef-ca4e-407f-a4ec-a35c35ce0c57.png?resizew=255)
(1)证明:
平面
:
(2)求四棱锥
的体积.
![](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/e6906f59d09ce31956d6f5ea2b23fc77.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/931bbffda5e872703c9947eccc47ede2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc47768bee81ee0c6fbc41e3fdeb22cc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/2b114aef-ca4e-407f-a4ec-a35c35ce0c57.png?resizew=255)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b61346bd4091070ba84a4046f87f365.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a930240a044298d1825843aaac30d84f.png)
您最近一年使用:0次
2020-11-25更新
|
710次组卷
|
2卷引用:贵州省贵阳市普通高中2020届高三上学期期末监测考试数学(文)试题
名校
解题方法
2 . 如图,在直三棱柱
中,
平面
,其垂足D落在直线
上.
![](https://img.xkw.com/dksih/QBM/2020/7/22/2511317087215616/2512109776297984/STEM/6fb7a136-a6f7-4cfc-96b5-d171bca5095e.png)
(1)求证:
;
(2)若P是线段AB上一点,
,
,三棱锥
的体积为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a211ad5a06b505b8365a62c1946f3cb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://img.xkw.com/dksih/QBM/2020/7/22/2511317087215616/2512109776297984/STEM/6fb7a136-a6f7-4cfc-96b5-d171bca5095e.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b4cdc3a083d1263634d510f172dab09.png)
(2)若P是线段AB上一点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9ad150cb1e4cd8977d4cc3d99be17c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/283c8668ca30b171ee4352452e1c7e94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e6d761c7fd9b42e8d8701351c76650d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf6c7b71d5689f613d106a141b548434.png)
您最近一年使用:0次
解题方法
3 . 如图,在四棱台
中,
,O分别为上、下底面对角线的交点,
平面
,底面
是边长为2的菱形,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/a42cdeb5-fcaf-4ff1-875d-6472c0eb97ee.png?resizew=241)
(1)证明:
平面
;
(2)若
,求三棱锥
的体积
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0424446817f60c18f8e4e3cc202ad99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/992a46406c0012e180ea16168e17bf32.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/e075468e7fb0bf30229aec01a7205977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/a42cdeb5-fcaf-4ff1-875d-6472c0eb97ee.png?resizew=241)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b4cd2b33bd983a9ed6575b9de04a46a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3658af15346c59829cfd9911bcc39922.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1adf768489b3650ae0bd6cc16fb4baf.png)
您最近一年使用:0次
2020-07-11更新
|
186次组卷
|
2卷引用:贵州省黔东南州2021届高三上学期第二次月考数学(文)试题
名校
解题方法
4 . 如图,
是半圆
的直径,平面
与半圆
所在的平面垂直,
,
,
,
是半圆
上不同于
,
的点,四边形
是矩形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/3d2a5411-b968-4822-be91-4dead2b9d707.png?resizew=109)
(Ⅰ)若
,证明:
平面
;
(Ⅱ)若
,求三棱锥
体积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c88df253c627c579756fd064c90c1dfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/a3d4810173d7a9e83e226beb43099ed1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/3d2a5411-b968-4822-be91-4dead2b9d707.png?resizew=109)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75929268210da5976bc37d080da030dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147e7c8ba0bbb540a712f6eb2ed6d22e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e2da608b66c9aee03e2503388ba4fd.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa711919d767a88b15c3f6dd7fd809a5.png)
您最近一年使用:0次
名校
解题方法
5 . 如图所示,在四棱锥
中,底面
为菱形,且
,平面
平面
,
,
分别在棱
,
上,且
.
![](https://img.xkw.com/dksih/QBM/2020/6/24/2491672798584832/2492566731939840/STEM/f730b2e667944a37b9e8d45b89c5f876.png?resizew=222)
(1)求证:
平面
;
(2)求三棱锥
的体积.
![](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/ea4f5eec0addba78f2e0cdfb7ecc59a6.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/d39911ef0f64558e572309561a7f4f74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d70de1ffdd9aa376b09bbcfa12644a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f739ea58db56d09da0e2e9dfd7f8dea7.png)
![](https://img.xkw.com/dksih/QBM/2020/6/24/2491672798584832/2492566731939840/STEM/f730b2e667944a37b9e8d45b89c5f876.png?resizew=222)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31c34b18525831f3eda7bb90be0199b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee72fd8a5a52d08a4fddcf0830a8e103.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/806a043f5365ce6b9f149ce26d8c27b8.png)
您最近一年使用:0次
2020-06-26更新
|
518次组卷
|
2卷引用:贵州省毕节市民族中学2021-2022学年高二上学期期中考试数学试题
名校
解题方法
6 . 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.
您最近一年使用:0次
2020-06-07更新
|
405次组卷
|
4卷引用:贵州省思南中学2019-2020学年高一下学期期中考试数学试题
7 . 如图,矩形
和菱形
所在的平面相互垂直,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/6838aac4-5d2e-4b24-94ed-7c9a847b6376.png?resizew=165)
(1)求证:
平面
;
(2)若
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d712028fc4d25036b70ab55de4d99d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/6838aac4-5d2e-4b24-94ed-7c9a847b6376.png?resizew=165)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071159cac13097ea0928285bc1be66d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fa3254460ecbacecb3e57c5dce227f4.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/298279841fc4c01b04224f34612c0f77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b67046592a3153a442165064287fcf.png)
您最近一年使用:0次
8 . 如图,在四棱锥
中,四边形
是菱形,
,
底面
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/f98396a2-3eca-4761-9d7c-c36155aaf901.png?resizew=166)
(Ⅰ)求证:
平面
;
(Ⅱ)过
的平面交
于点
,若
平面
,求三棱锥
的体积.
![](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/c5b0382c28547d3834ca71f3f0677695.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/00bab2c27eac56fffa4cd7dbe1dcdf1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/f98396a2-3eca-4761-9d7c-c36155aaf901.png?resizew=166)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(Ⅱ)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30067b7b236d17af8a462f96a58d11bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53bdef2e7a7929ad6190302ab44c46c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7826e3c6a53025324df827b39c9f7db7.png)
您最近一年使用:0次
2020-09-01更新
|
240次组卷
|
3卷引用:贵州省遵义市2018-2019学年高二下学期期末统考数学(文)试题
名校
解题方法
9 . 如图,在多面体
中,平面
平面
,
,
,
,
,
是
的中点,
平面
,
.
![](https://img.xkw.com/dksih/QBM/2020/4/10/2438724292001792/2439815394910208/STEM/a36139f661eb47b6be9585707276932b.png?resizew=165)
(1)证明:
、
、
、
四点共面;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17580410bf63dba4fe164265afaac4cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0028211551dd418eaaf51dde450f8b73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/236c134aad7d9a21c49c07e924b9a531.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c24a968c73e960698a572ab01e3698.png)
![](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/4a5f445af1ae136773cb338920552ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9a3b90f9fb4eed1e6ed66f3fb65dc52.png)
![](https://img.xkw.com/dksih/QBM/2020/4/10/2438724292001792/2439815394910208/STEM/a36139f661eb47b6be9585707276932b.png?resizew=165)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c2bd5eaf71f8866c0979fa299df50d.png)
您最近一年使用:0次
10 . 如图,在直角梯形
中,
,
,
,
为
的中点,沿
将
折起,使得点
到点
位置,且
,
为
的中点,
是
上的动点(与点
,
不重合).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/a07921ba-4470-4e77-be8c-f02d582c1503.png?resizew=317)
(1)证明:平面
平面
;
(2)设三棱锥
和四棱锥
的体积分别为
和
,当
为
中点时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd8e727e4efc22b49649f71ae9c9d84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b5ff288b8b59c0494758ae67bbe10d.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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f460edcced5597615113c0fdc95b1dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dec9c5d7af1c18018bce59adcd761e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)设三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34a43d2ca7740ab26e5460a70848b0a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9e4694629f7c01980a0e13c89bb6871.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f737b04ce09bc7e1ed86dc9b3c85203b.png)
您最近一年使用:0次
2020-03-26更新
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335次组卷
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3卷引用:贵州省铜仁市2023届高三适应性考试(二)数学(文)试题