解题方法
1 . 三棱锥
中,点A在平面BCD的射影H是△BCD的垂心,点D在平面ABC的射影G是△ABC的重心,
,则此三棱锥体积的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
2 . 如图,在多面体
中,四边形
是平行四边形,四边形
是矩形,
,
,
,
分别是棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/9/47ef9753-2339-43a8-97b2-224f757fe3df.png?resizew=206)
(1)证明:
平面
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4b93d7abcfc4c3df48f03aa969c17f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84daca1ff0963ca5784c333129df6329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05740f0c6071846227dc0ec177ad15e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdf23e73ae2a15c04bbed3981cb8e511.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dca967c33ca085919cb91c4baaa35991.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bebf42a849a1e6ffdc800203c3d01965.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/9/47ef9753-2339-43a8-97b2-224f757fe3df.png?resizew=206)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4b93d7abcfc4c3df48f03aa969c17f.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c17d82f8f18d0096846ec63109654633.png)
您最近一年使用:0次
2023-02-03更新
|
219次组卷
|
2卷引用:新疆维吾尔自治区乌鲁木齐市第97中学2024届高三上学期12月月考数学试题
名校
3 . 已知圆
的直径
,
圆
所在平面,
,点
是圆周上不同于
、
的一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/4/f1545863-8d2f-4ad2-84a5-ebb9446b7057.png?resizew=167)
(1)证明:
;
(2)已知
,点
是棱
上一点,若
与平面
所成角的余弦值为
,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/4/f1545863-8d2f-4ad2-84a5-ebb9446b7057.png?resizew=167)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5148e7fc64ac3fed107192236f8e129d.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](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/0b60870baa5e3fbc33a749aa5f0a94be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e699f6e1923284a5eecdc897bfbc2337.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2023-01-18更新
|
425次组卷
|
3卷引用:新疆乌鲁木齐市第101中学2022-2023学年高二下学期开学考试数学试题
名校
4 . 如图,在多面体
中,四边形
是矩形,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63e3a8f4ea4c49537514dd22064100f9.png)
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/b4146b39-5172-455e-95ca-7865cb927a8b.png?resizew=188)
(1)证明:
;
(2)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/b312dab930cbbb9a4bb1a99f044dab73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63e3a8f4ea4c49537514dd22064100f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307492a5106b38351e52cd4fff8b1ec8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/b4146b39-5172-455e-95ca-7865cb927a8b.png?resizew=188)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e49a850dd76dc1162ff2eda8791b772.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9af29254fe60a392c249c5791279e9c8.png)
您最近一年使用:0次
2023-01-16更新
|
282次组卷
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2卷引用:新疆乌鲁木齐市第六十一中学2024届高三上学期12月月考数学试题
名校
5 . 在四棱锥
中,平面
底面ABCD,底面ABCD是菱形,E是PD的中点,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/e6a95353-0043-4fd0-82fe-b47e99b82296.png?resizew=140)
(1)证明:
平面EAC;
(2)求直线EC与平面PAB所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7fca40920c70c01c551e83d61e69b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/e6a95353-0043-4fd0-82fe-b47e99b82296.png?resizew=140)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa69a2247ad4d5231aa361349b12f97.png)
(2)求直线EC与平面PAB所成角的正弦值.
您最近一年使用:0次
2022-12-31更新
|
713次组卷
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4卷引用:新疆乌鲁木齐市第一中学2022-2023学年高二下学期开学诊断性测试数学试题
6 . 长方体
中,
,
,上底面
的中心为
,当点
在线段
上从
移动到
时,点
在平面
上的射影
的轨迹长度为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb4957406b21df59fdf7fa184752287b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1b90bf8b51db7a4ff6e0678bd3d1ea0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d609847e2ff3d64e5a514582c3ead0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ecac2dad4cffdd971fd23deacff3fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-11-15更新
|
351次组卷
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3卷引用:新疆乌鲁木齐市第101中学2023届高三下学期2月月考文科数学试题
名校
解题方法
7 . 如图,在四棱锥
中,底面
为等腰梯形,
为直线
上一点,
与
交于点
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/16/d295a60d-d2d4-4568-a29d-f9dc265553d2.png?resizew=221)
(1)求点
到直线
的距离;
(2)是否存在点
,使得
平面
?若存在,求出
点位置,若不存在,请说明理由.
![](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/81597f85ed936d375311ad3b33127e24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7145b06b4cffd26a1b25f320caacf91b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/16/d295a60d-d2d4-4568-a29d-f9dc265553d2.png?resizew=221)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
(2)是否存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
您最近一年使用:0次
2022-10-13更新
|
273次组卷
|
2卷引用:新疆维吾尔自治区乌鲁木齐市第二十三中学2024届高三上学期12月月考数学试题
8 . 我国古代数学名著《九章算术》中记载的“刍䠢”指底面为矩形.顶部只有一条棱的五面体.如图,五面体
是一个“刍䠢”,其中
是正三角形,
,
,则该五面体的体积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/10/ac7a9bec-a9d6-44bd-9d5b-eb19051d83f5.png?resizew=246)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6830ebecddbd9759be626289c408e4f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09127d864c0cb3e5bf88e93a6a82cf40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6160d4e567a1bfd3a6ee159067453579.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/10/ac7a9bec-a9d6-44bd-9d5b-eb19051d83f5.png?resizew=246)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-10-07更新
|
788次组卷
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3卷引用:新疆乌鲁木齐市第十二中学2023届高三下学期2月月考数学(文)试题
新疆乌鲁木齐市第十二中学2023届高三下学期2月月考数学(文)试题(已下线)专题18 空间几何题综合问题(体积、面积、角度、距离、轨迹等)(选填题)-2浙江省浙南名校联盟2022-2023学年高三上学期第一次联考数学试题
名校
解题方法
9 . 如图所示,已知正方体
,O是底面ABCD对角线的交点.
![](https://img.xkw.com/dksih/QBM/2022/8/22/3049801562415104/3054526105051136/STEM/e8023f713bdd46de87b49b4aacd3028d.png?resizew=244)
(1)求证:
平面
;
(2)求证:
平面
;
(3)若
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/2022/8/22/3049801562415104/3054526105051136/STEM/e8023f713bdd46de87b49b4aacd3028d.png?resizew=244)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d13793af05742c91532f43727eb9780.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae7f4612c548b1f72a964ddb291cd2e.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26d8a9d64ad3c8cba28840b41ed7837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae7f4612c548b1f72a964ddb291cd2e.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6189a4d33d37927684c7a68f32794373.png)
您最近一年使用:0次
2022-08-28更新
|
496次组卷
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2卷引用:新疆乌鲁木齐市第101中学2023届高三下学期2月月考数学(理)试题
名校
解题方法
10 . 如图,在四面体
中,
,
,
,
,则四面体中存在面面垂直关系的对数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/16/b02fb9cd-0bd6-45b8-9d27-086a85b2fd6a.png?resizew=147)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a77e3c1c236141d6118429fade0a9b9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/def26b3c1c08356f8fa49c85fe19476b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d6bdfb0e1be5583e794ab614a8abe1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d4a076ed1d783e96ac9ed36f5d609ad.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/16/b02fb9cd-0bd6-45b8-9d27-086a85b2fd6a.png?resizew=147)
A.2 | B.3 | C.4 | D.5 |
您最近一年使用:0次
2022-07-25更新
|
801次组卷
|
3卷引用:新疆乌鲁木齐市第101中学2023届高三下学期2月月考数学(理)试题