1 . 已知四棱锥
中,
,
平面
,点
为
三等分点(靠近
点),
,
,
.
![](https://img.xkw.com/dksih/QBM/2022/3/29/2946770215813120/2947907939516416/STEM/538954bc-3d32-4d0b-9b56-cf0f84987aa4.png?resizew=192)
(1)求证:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/958f880eccc0a0e15aefc54078d8aa2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac192cfba38bf0e2df0c2d490596aa65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44b190c8d3d7d7d0e6e959e8a52eae90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dd92e5c56c1b76dd3811108f2cc1286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f88870519c473fb6fb36b5a88a42df24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e4280be91682e5d8a0d0704190319bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac2ae98eb223b4fe33e53e9d3ba4cc40.png)
![](https://img.xkw.com/dksih/QBM/2022/3/29/2946770215813120/2947907939516416/STEM/538954bc-3d32-4d0b-9b56-cf0f84987aa4.png?resizew=192)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ade8233bc5e455bc00825e081647519.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632854d063d897c2b4df9551098118e9.png)
您最近一年使用:0次
解题方法
2 . 如图,四棱柱
的底面是边长为2的正方形,侧棱
平面ABCD,且
,E、F分别是AB、BC的中点,P是线段
上的一个动点(不含端点),过P、E、F的平面记为
,Q在
上且
,则下列说法正确的个数是( ).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/f09212f8-750e-48ea-89f4-5304f8508592.png?resizew=141)
①三棱锥
的体积是定值;
②当直线
时,
;
③当
时,平面
截棱柱所得多边形的周长为
;
④存在平面
,使得点
到平面
距离是A到平面
距离的两倍.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa858b7c23b77ab2647e01ae4ad57fb5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/f09212f8-750e-48ea-89f4-5304f8508592.png?resizew=141)
①三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/875bdebefed0e23c0dc058f106f3b8f8.png)
②当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65cd001ef3de929498a919caaedeec84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/982635c07eaa7715b1ffd9dbabc3bcaa.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65592c5c899b178c0143daa149c33cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86391dc521a0d9de2a6e08ed04a9ac63.png)
④存在平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
3 . 如图,四棱锥
的底面是直角梯形,
,
,
平面
,
是
的中点,
与平面
交于点
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/8b9823c8-e56c-4c10-ae54-d5e06f121b41.png?resizew=151)
(1)求证:
是
的中点;
(2)若
为棱
上一点,且直线
与平面
所成的角的正弦值为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1c37e7a6c15bbc553ad4868d23be7f2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/8b9823c8-e56c-4c10-ae54-d5e06f121b41.png?resizew=151)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc704b98f4ed2c7359a7a5b6498b5290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7294f5ae2a24ff42e84cd9773b2a7287.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47548785e478bc5b9591341a881e3127.png)
您最近一年使用:0次
2022-01-16更新
|
668次组卷
|
5卷引用:广西2022届高三4月大联考数学(理)试题
解题方法
4 . 如图,在直三棱柱
中,
,E、F分别是
、
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/030b8f1e-00bd-402b-9bb6-6b99b2b33a99.png?resizew=150)
(1)求证:
平面
;
(2)求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2498b78493e5ba9c3c4dd582e866e76b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/030b8f1e-00bd-402b-9bb6-6b99b2b33a99.png?resizew=150)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
您最近一年使用:0次
2021-10-24更新
|
725次组卷
|
3卷引用:广西南宁市2022届高三高中毕业班上学期摸底测试数学(文)试题
5 . 如图,在正方体
中,点M在线段
(不包含端点)上运动,则下列判断中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/27/6a2ae746-9d42-4a38-97c0-64f1ff990906.png?resizew=169)
①
平面
; ②异面直线
与
所成角的取值范围是
;
③
平面
恒成立; ④三棱锥
的体积不是定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/27/6a2ae746-9d42-4a38-97c0-64f1ff990906.png?resizew=169)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98dbbf1a30ea54a46b903a9645debab4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7977ab975efa6411cc17de39be70d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9399c9a2a31b0e3165aea2d6ccc4f7c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c09eec4e14a861af83d7828797d176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8419e07aa1a95c981372fc886bebc588.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3414bf337e4831721c7d894f6e125369.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6557d0725272b008c5969c0a203aa10.png)
A.①③ | B.①② | C.①②③ | D.②④ |
您最近一年使用:0次
2021-10-24更新
|
1010次组卷
|
7卷引用:广西南宁市2022届高三高中毕业班上学期摸底测试数学(文)试题
广西南宁市2022届高三高中毕业班上学期摸底测试数学(文)试题(已下线)专题36 立体几何之根本-空间平行与垂直问题-备战2022年高考数学一轮复习一网打尽之重点难点突破(已下线)考点31 直线、平面平行与垂直的判定与性质-备战2022年高考数学典型试题解读与变式(已下线)热点06 空间位置关系的判断与证明-2022年高考数学【热点·重点·难点】专练(全国通用)(已下线)重难点03 空间向量与立体几何-2022年高考数学【热点·重点·难点】专练(新高考专用)江西省南昌市第十中学2021-2022学年高二下学期第一次月考数学(文)试题江西省南昌市第十中学2021-2022学年高二下学期第一次月考数学(理)试题
名校
解题方法
6 . 如图,在四棱锥
中,
是边长为2的等边三角形,梯形
满足
,
,
,M为AP的中点.
![](https://img.xkw.com/dksih/QBM/2021/12/23/2878587058946048/2924764614393856/STEM/c324e68b-eab1-4f19-b18d-e8661c31a056.png?resizew=174)
(1)求证:
平面
;
(2)若
,求点C到平面PAD的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e921f46d90e43f4517c55832b6280f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://img.xkw.com/dksih/QBM/2021/12/23/2878587058946048/2924764614393856/STEM/c324e68b-eab1-4f19-b18d-e8661c31a056.png?resizew=174)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcfacd208d769d01f1d4ef20313cd869.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cd5c4f8b106d01e0e431078e1a468b.png)
您最近一年使用:0次
2022-02-26更新
|
520次组卷
|
3卷引用:广西南宁市第三中学2023届高三下学期数学强化训练试题(一)
名校
解题方法
7 . 如图,已知多面体EABCDF的底面ABCD是边长为2的正方形,
,
,且
.
(1)记线段
的中点为
,在平面
内过点
作一条直线与平面
平行,要求保留作图痕迹,但不要求证明;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e04eb87d1aa3784c08f3239d4ff99e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a060f4fc2c8034b08c77c065f9e125d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba1316f4183e8854d38283b716e2ba1b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/18/163f8856-84f6-45d9-95fa-fa04563ea83d.png?resizew=139)
(1)记线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f636f76d550dfb593a25eb680cff556.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f636f76d550dfb593a25eb680cff556.png)
您最近一年使用:0次
2023-06-15更新
|
597次组卷
|
9卷引用:广西桂林市桂林中学2017届高三5月全程模拟考试数学(理)试题
广西桂林市桂林中学2017届高三5月全程模拟考试数学(理)试题山西省太原市第五中学2017届高三第二次模拟考试(5月) 数学(理)试题辽宁省鞍山市第一中学2018届高三上学期第二次模拟考试(期中)数学(理)试题天津市实验中学2018届高三上学期第二次模拟数学(理)试题江西省临川二中、新余四中2018届高三1月联合考试数学(理)试题安徽省舒城中学2023届高三仿真模拟卷(三)数学试题(已下线)重难点突破06 立体几何解答题最全归纳总结(九大题型)-2(已下线)专题15 立体几何解答题全归类(9大核心考点)(讲义)-1(已下线)重难点12 立体几何必考经典解答题全归类【九大题型】
名校
8 . 如图,四棱锥
的底面为矩形,
底面
,
,
,点
是
的中点,过
,
,
三点的平面
与平面
的交线为
,则下列结论中正确的有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/0c7c630a-15a7-4072-961b-56a1f68f19c9.png?resizew=140)
(1)
平面
;
(2)
平面
;
(3)直线
与
所成角的余弦值为
;
(4)平面
截四棱锥
所得的上、下两部分几何体的体积之比为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99926bf272cd757f0985c69b390ebcce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/0c7c630a-15a7-4072-961b-56a1f68f19c9.png?resizew=140)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93a4afe69e9ee3c701f1f109c3a0a7d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6ae72f5e5891249caa10c43224da89c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(3)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee14db57f0c762aad845cf5b4a243c0.png)
(4)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
A.1个 | B.2个 |
C.3个 | D.4个 |
您最近一年使用:0次
2021-10-14更新
|
2741次组卷
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5卷引用:广西柳州市第三中学2022届高三3月模热身考数学(理)试题
广西柳州市第三中学2022届高三3月模热身考数学(理)试题贵州省贵阳市五校(贵阳民中 贵阳九中 贵州省实验中学 贵阳二中 贵阳八中)2022届高三上学期联合考试(二)数学(理)试题(已下线)考点33 直线与平面所成的角【理】-备战2022年高考数学典型试题解读与变式(已下线)专题2 点、直线、平面之间的位置关系-学会解题之高三数学321训练体系【2022版】(已下线)第五章 破解立体几何开放探究问题 专题一 立体几何存在性问题 微点3 立体几何存在性问题的解法综合训练【基础版】
名校
解题方法
9 . 如图,在多面体
中,△
是等边三角形,△
是等腰直角三角形,
,平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc775691cd03e1abed66100c942eb3a8.png)
平面
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
平面
,点
为
的中点,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/2564340d-22ea-4b98-9a30-645db6333e8d.png?resizew=180)
(1)求证:
∥平面
;
(2)若
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4955368b48bff112474b81c00c05d047.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc775691cd03e1abed66100c942eb3a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9215d0542ede79ad53c88f1d0da10af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc775691cd03e1abed66100c942eb3a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/2564340d-22ea-4b98-9a30-645db6333e8d.png?resizew=180)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9906ca0da086c36c05fe3e42cf373fe.png)
您最近一年使用:0次
2021-10-11更新
|
358次组卷
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3卷引用:广西壮族自治区贵港市西江高级中学2024届高三上学期10月月考数学试题
10 . 如图,在四棱锥PABCD中,底面ABCD是菱形,侧面PCD是等边三角形且与底面ABCD垂直,PD=AB=4,E、F分别为AB、PC的点,且PF=
PC,AE=
AB.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/696c5b01-a307-494a-8ec9-4dd5ee4cfa88.png?resizew=202)
(1)证明:直线EF//平面PAD;
(2)若BAD=60,求三棱锥BEFC的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/696c5b01-a307-494a-8ec9-4dd5ee4cfa88.png?resizew=202)
(1)证明:直线EF//平面PAD;
(2)若BAD=60,求三棱锥BEFC的体积.
您最近一年使用:0次
2021-10-04更新
|
400次组卷
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3卷引用:广西柳州铁一中学“韬智杯”2022 届高三上学期大联考数学(文)试题