名校
1 . 如图1,在边长为2的菱形
中,
,将
沿对角线
折起到
的位置,使平面
平面
,E是BD的中点,
平面ABD,且
,如图2.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/e0dacef5-440c-4ec4-9923-e83b49b964da.png?resizew=262)
(1)求证:
平面
;
(2)在线段AD上是否存在一点M,使得
平面
,若存在,求
的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fddde3540c30df14382a7beda4cddef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380a94a5bb8cd6a6c8b4ec39019f2fa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147e7c8ba0bbb540a712f6eb2ed6d22e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b587b3d65a1d990dafcbb8815adf2e82.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/e0dacef5-440c-4ec4-9923-e83b49b964da.png?resizew=262)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a89cc8bc24e31352bcfd1374db7432a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbf3fdaa02b40059091b648461c8c8d0.png)
(2)在线段AD上是否存在一点M,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/414327539b4f53fd39eb5a0e5c455148.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d95a8406c459460675a24d8a1d9abde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d641de320b307374639e50dba2f2212.png)
您最近一年使用:0次
2023-12-11更新
|
881次组卷
|
3卷引用:陕西省渭南市高级中学2023-2024学年高二上学期12月月考数学试题
解题方法
2 . 如图,在四棱锥
中,平面
平面
,四边形
为正方形,
为等边三角形,
是
中点,平面
与棱
交于点
.
(1)求证:
;
(2)求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8f02e0729ccab6841b4a70e5e73b703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.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/2205cffebf8c4d5f81d15ed7b85c8936.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/97a9b32570d553161be04d13954e92a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/30/ac06574b-3ba4-4d63-a16f-5b503db4894e.png?resizew=180)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afa38e1cff9475527c89cfb1064560e8.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45fbffb9e2c7fa7c5006cde8da0cabe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/946c16d99496d31ce4d87301a4793393.png)
您最近一年使用:0次
3 . 如图,在四棱锥
中,底面
为正方形,侧面
是正三角形,侧面
底面
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/11/e639e37a-dde7-41eb-a07f-350267a0374c.png?resizew=176)
(1)求证:
平面
;
(2)设正方形
的边长为
,求侧面
与底面
夹角的余弦值.
![](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/852aabd89edffc1b94344ff3f1f31ccd.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/11/e639e37a-dde7-41eb-a07f-350267a0374c.png?resizew=176)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0edb1508fc95765f3bb316bcb5252d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)设正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/878e89b6eca35e34c863e832a2c661db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
4 . 如图,在四棱锥
中,底面
为菱形,
是边长为2的正三角形,
.
(1)求证:
;
(2)若平面
平面
,求二面角
的余弦值.
![](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/177678001b2ccde1db8f57fa5e017002.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ec435aa1401dbce7863b531bf2f3e5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/21/ed210efd-de98-49b4-a9db-88fbd81bbf0a.png?resizew=145)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60334b062acf697efaa4f3f7087a80dc.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e867e5c7ef4da37d8985ce82022060e.png)
您最近一年使用:0次
2023-09-21更新
|
1572次组卷
|
5卷引用:陕西省渭南市富平县富平中学2024届高三上学期第三次质量检测数学(理)试题
2023·全国·模拟预测
名校
解题方法
5 . 如图,在几何体
中,四边形
是边长为2的正方形,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/31/17fc372e-e5c6-4623-8fc0-aaf6addb1cf6.png?resizew=160)
(1)求证:平面
平面
.
(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/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c1c122603b60b6f1a1334ddb56c3fb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e18f38545fb6d8ba32c993f60dc9a774.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1133f10924d3184380712222aea0843d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/31/17fc372e-e5c6-4623-8fc0-aaf6addb1cf6.png?resizew=160)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39282bdf319f30d7bc261e2e3ab3b1e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae8768996ca9a0f2c5d9a19abbd54df.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
您最近一年使用:0次
2023-03-29更新
|
721次组卷
|
3卷引用:陕西省渭南市瑞泉中学2023-2024学年高二上学期期末考试数学试题
陕西省渭南市瑞泉中学2023-2024学年高二上学期期末考试数学试题(已下线)2023年普通高等学校招生全国统一考试·押题卷数学(三)新疆维吾尔自治区伊犁哈萨克自治州霍尔果斯市苏港中学2022-2023学年高二下学期期中数学试题
解题方法
6 . 如图,四边形
是边长为2的正方形,平面
平面
,
,
,
,
.
(1)求证:
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd3e927b7b2383ccded03838ae8b30b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf4dc4d7d30af1cdce660795e0fd7d7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60634341a9603e24b2bbc6960abe3d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0cee0f36dc452e58086832c0152b641.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/10/03500e93-7db9-4651-b6ac-912eeeb84db1.png?resizew=124)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a35b3671adbe86df7b0e40a4f94b4062.png)
您最近一年使用:0次
名校
解题方法
7 . 如图,已知四棱锥
的底面为直角梯形,平面
平面
,且
的中点分别是
.请用空间向量知识解答下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/13f16cf8-d675-4056-a70f-f9bd71b441bc.png?resizew=167)
(1)求证:
平面
;
(2)求二面角
的余弦值.
![](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/52d253df6d3d0d8f5f917a4dfff4854e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/003162126d42a97b2c92849aa2093aea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63800b899fa56d46eeb5f3dd0ced9723.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/13f16cf8-d675-4056-a70f-f9bd71b441bc.png?resizew=167)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a95beabc50316cb3394397998d3a2b2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30f457418e6a7e21f0ed0bf490a3709c.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0dcdff74d82c751b8a997903cd02afd.png)
您最近一年使用:0次
2022-12-23更新
|
188次组卷
|
2卷引用:陕西省渭南市韩城市2021-2022学年高二上学期期末理科数学试题
解题方法
8 . 设某几何体及其三视图:如图(尺寸的长度单位:m)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/8caf5821-8200-445f-9aaa-6b555410ef53.png?resizew=336)
(1)O为AC的中点,证明:BO⊥平面APC;
(2)求该几何体的体积;
(3)求点A到面PBC的距离.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/8caf5821-8200-445f-9aaa-6b555410ef53.png?resizew=336)
(1)O为AC的中点,证明:BO⊥平面APC;
(2)求该几何体的体积;
(3)求点A到面PBC的距离.
您最近一年使用:0次
9 . 如图,在四棱锥
中,底面
是平行四边形,平面
平面
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/19/5df6c5cb-a622-4cb8-83df-b9f1c9e4b1ba.png?resizew=174)
(1)求证:
平面
;
(2)设点
是
的中点,若
,
,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/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f757a971a728eb73b9ea66a6e18c22b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dd63641dda745cf8917852d3e48fa70.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/19/5df6c5cb-a622-4cb8-83df-b9f1c9e4b1ba.png?resizew=174)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff9c7cbcc38b28d45c8539710e5b260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714cc3707bba3bfdb56e251999be8592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c2bd5eaf71f8866c0979fa299df50d.png)
您最近一年使用:0次
2023-04-17更新
|
625次组卷
|
2卷引用:陕西省渭南市临渭区2020-2021学年高一上学期期末数学试题
名校
10 . 如图,在四棱锥
中,底面ABCD是边长为2的正方形,
为正三角形,且侧面
底面ABCD,
,O为AB的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/20/6fd25720-4942-460a-b140-e6999d63491a.png?resizew=171)
(1)求证:
平面ACM;
(2)求二面角
的余弦值.
![](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/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b74837b473f275b811eae37cfd3f4bdb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/20/6fd25720-4942-460a-b140-e6999d63491a.png?resizew=171)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30067b7b236d17af8a462f96a58d11bd.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70682f6196e6c1a08eb48da73e8919ca.png)
您最近一年使用:0次
2023-03-19更新
|
709次组卷
|
3卷引用:陕西省渭南市临渭区2021届高三下学期三模理科数学试题