名校
解题方法
1 . 如图,在正方体
中,
分别为棱
的中点,过
三点作该正方体的截面,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9df7fc746f8c4801d8f2f0471ba3297e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6b82cb2bf3d81d38778334b33eed682.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/7e0e9e49-da2b-4091-bce3-59bb21d19808.png?resizew=177)
A.该截面是四边形 |
B.![]() ![]() |
C.平面![]() ![]() |
D.该截面与棱![]() ![]() |
您最近一年使用:0次
2024-02-05更新
|
1009次组卷
|
4卷引用:安徽省江南十校2024届高三联考信息卷数学模拟预测卷(一)
安徽省江南十校2024届高三联考信息卷数学模拟预测卷(一)陕西省安康中学等校2023-2024学年高三上学期1月大联考文科数学试题(全国乙卷)(已下线)第三套 复盘卷(已下线)重难点6-2 空间几何体的交线与截面问题(8题型+满分技巧+限时检测)
名校
解题方法
2 . 如图,多面体
是由一个正四棱锥
与一个三棱锥
拼接而成,正四棱锥
的所有棱长均为
,
.
上找一点G,使得平面
平面
,并证明你的结论;
(2)若
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2b24136c688c1dcb489dd67da5154d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8af2fdf1944afebb51cb6a5e6c74aadd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b7e7e42ef653d2d6284c032df57c06b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73153657848013d2a1c3247d7f84ddeb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27ba952c1209a61b00cc62aacb367292.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
2024-02-03更新
|
1025次组卷
|
2卷引用:安徽省合肥市第一中学2024届高三上学期期末质量检测数学试题
名校
3 . 如图,在四棱锥中,平面
平面
,
,
,
,
,
.
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9104a1941e557a85fd1496bc2b9be297.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee14db57f0c762aad845cf5b4a243c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
2024-01-26更新
|
1963次组卷
|
7卷引用:安徽省阜阳市阜阳一中2023-2024学年高二下学期开学检测数学试题
安徽省阜阳市阜阳一中2023-2024学年高二下学期开学检测数学试题广东省茂名市2024届高三一模数学试题江西省2024届高三上学期一轮总复习验收考试数学试题江西省上饶市六校2024届高三第一次联合考试(2月)数学试卷(已下线)第5讲:立体几何中的动态问题【练】(已下线)高考数学冲刺押题卷01(2024新题型)(已下线)题型20 6类立体几何大题解题技巧
名校
4 . 如图,在三棱柱
中,底面
侧面
.
(1)证明:
平面
;
(2)若三棱锥
的体积为
为锐角,求平面
与平面
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76b3e80d3a58ac3cf00b42f41747c311.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/14/28bf2a63-9877-4a90-b31e-32b3dbd6e259.png?resizew=165)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26d8a9d64ad3c8cba28840b41ed7837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b7903de4be7d5dc1175cfbf6e8da9f.png)
(2)若三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aab8cba157598642cb6b42734861a184.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f217108ab64f0c7b5d097e564a7adf63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b7903de4be7d5dc1175cfbf6e8da9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd06851d747f8ccf046bc807b2523e65.png)
您最近一年使用:0次
2024-01-24更新
|
194次组卷
|
2卷引用:安徽省舒城中学2023-2024学年高二下学期开学考试数学试卷
5 . 已知
,
是两条不同的直线,
,
是两个不同的平面,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
A.若![]() ![]() ![]() | B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() | D.若![]() ![]() ![]() |
您最近一年使用:0次
2024-01-07更新
|
2399次组卷
|
4卷引用:安徽省淮北市2024届高三第一次质量检测数学试卷
安徽省淮北市2024届高三第一次质量检测数学试卷(已下线)艺体生一轮复习 第七章 立体几何 第33讲 空间中的平行关系【讲】 2024年1月“九省联考”仿真卷数学试题湖南省长沙市第一中学2024届高三数学新改革适应性训练一(九省联考题型)
名校
6 . 已知四棱锥
,底面
为平行四边形,
,
,
,
.
平面
;
(2)若
,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/81f17680a23635f823b7dc446e4f3b0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efa3a6cbbb3f384c7cb91ec88c072ab2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f286b7a8d1b81bb0a7441db0233b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfa8dfca7fc8d02285b724979e9f20fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c383691e8d740830a865b12d66f7633.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/290a37874cd284fb1a8c864769ce50c9.png)
您最近一年使用:0次
2023-12-17更新
|
1164次组卷
|
3卷引用:安徽省2024届“耀正优+”12月高三名校阶段检测联考数学试题
7 . 如图,任四棱锥
中,
为棱
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/22/45c97815-1578-479c-a98f-8627d307d8b0.png?resizew=159)
(1)求证:
;
(2)若
,求
与平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4f56b083b76064e365d85f7acd63e30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2a430dcbeac2ddf117c24959c25b47e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/22/45c97815-1578-479c-a98f-8627d307d8b0.png?resizew=159)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdfa54114f04a75b8c96165b3718ed7f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba8c7d2b78ab2452b0a57925241dbdb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
8 . 如图,已知
平面ABCD,底面ABCD为正方形,PA=AD=AB=2,M,N分别为AB,PC的中点.求证:
平面PCD.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93cf663ee2bf1ac5c43f4306fa0cf250.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/21/43a2e183-e547-482b-87fc-a177a0adf54a.png?resizew=172)
您最近一年使用:0次
名校
9 . 如图,在三棱锥
中,
为等腰直角三角形,
,
,
,且平面
⊥平面
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/21/0b31f672-2926-4550-93ef-8b2fb6717acd.png?resizew=145)
(1)求
的长;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af2cc5f8cec8c498aa12c99c04e1c97d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1a7f9663cfa1bd647476212ddbb7ce8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb6bb21b34bc18086733e2f3ed8bf49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e766e52e5f64705a847ff1dbaba69c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/21/0b31f672-2926-4550-93ef-8b2fb6717acd.png?resizew=145)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
您最近一年使用:0次
2024-01-21更新
|
108次组卷
|
2卷引用:安徽省2023-2024学年高二上学期阶段性检测数学试题
名校
10 . 设
为多面体
的一个顶点,定义多面体
在点
处的离散曲率为
,其中
,
为多面体
的所有与点
相邻的顶点,且平面
,平面
,平面
和平面
为多面体
的所有以
为公共点的面.已知在直四棱柱
中,四边形
为菱形,
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2fe17927b79a9ab83ed1a35b904bd47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b85d56ea80d4deec9999740b0017cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc04267cf51638f5ac54810e1f61f7b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/183f3fdb3204864ff2f60c8c1dac2f2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/811c1faee9e311a5986cc009767ef76a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9d7f18c3c9dae7e6d4f2e96281289f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f733e19f18ab01a3c022331805ed58a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeed487430a5b8a330f2d0c52166521a.png)
A.四棱柱![]() |
B.若![]() ![]() ![]() ![]() |
C.若四面体![]() ![]() ![]() ![]() ![]() |
D.若四棱柱![]() ![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次