名校
解题方法
1 . 如图所示,四棱锥
中,
,
,
,
,
,
,E为CD的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/8a985622-e57d-4d14-a6f0-c1384845d67d.png?resizew=185)
(1)求证:
;
(2)求三棱锥
与四棱锥
的体积比.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57009eca005a9dbd681439b4d48ebaea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b40d0d2f3cdd8981bb792ad87efb42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d4746df85049d1651d3f6c30212a7a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa18c2a78c400c80a5760743f31771c0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/8a985622-e57d-4d14-a6f0-c1384845d67d.png?resizew=185)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ec00ff2ccbb5cb357701e85e6c1cf2d.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/042923d5220d5d1a22f20ce2d9edc43e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12df7c77005d7c4eebe5a7dcb2aa9f17.png)
您最近一年使用:0次
解题方法
2 . 在长方体ABCD﹣A1B1C1D1中,底面ABCD是边长为2的正方形,E是AB的中点,F是BC的中点
(1)求证:EF∥平面A1DC1;
(2)若长方体ABCD﹣A1B1C1D1中,夹在平面A1DC1与平面B1EF之间的几何体的体积为
,求点D到平面B1EF的距离.
(1)求证:EF∥平面A1DC1;
(2)若长方体ABCD﹣A1B1C1D1中,夹在平面A1DC1与平面B1EF之间的几何体的体积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d8c501994be4ef94a276b689802a5f9.png)
![](https://img.xkw.com/dksih/QBM/2020/2/2/2390315033804800/2421647972073472/STEM/4fb6a898-dc97-4995-8b1d-f0b2323b8904.png?resizew=235)
您最近一年使用:0次
解题方法
3 . 如图,在长方体
中,
,
为
的中点,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/cab0350e-4643-4966-9b62-1873635d5112.png?resizew=146)
(1)求证:
平面
;
(2)求平面
与平面
所成二面角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cff17a9aa7466b66b0c678f294dca021.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/cab0350e-4643-4966-9b62-1873635d5112.png?resizew=146)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae7f4612c548b1f72a964ddb291cd2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db3ef97d64e58d311019b70fe5e2cc0d.png)
您最近一年使用:0次
4 . 如图,直三棱柱ABC-A1B1C1中,D,E分别是AB,BB1的中点,AA1=AC=CB=
AB.
![](https://img.xkw.com/dksih/QBM/2021/11/6/2845467340947456/2849234123825152/STEM/cee65f7f-a2fd-4504-a3ad-037ae8ecde7a.png)
(1)证明:BC1∥平面A1CD;
(2)求异面直线BC1和A1D所成角的大小;
(3)当AB=2
时,求三棱锥C-A1DE的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://img.xkw.com/dksih/QBM/2021/11/6/2845467340947456/2849234123825152/STEM/cee65f7f-a2fd-4504-a3ad-037ae8ecde7a.png)
(1)证明:BC1∥平面A1CD;
(2)求异面直线BC1和A1D所成角的大小;
(3)当AB=2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
您最近一年使用:0次
2021-11-11更新
|
784次组卷
|
5卷引用:广西南宁普通高中2022届高三11月教学质量检测数学(文)试题
解题方法
5 . 如图,在四棱锥
中,
,
分别为
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/da9b6ba4-071b-4572-a977-0deef266879f.png?resizew=135)
(1)求证:
平面
;
(2)求直线
与底面
所成角的大小
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8662205622d3b0c8dbfc543c64188f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c03e90ca7144c0ffbb6a6cc4a106784c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/382b1cf964713bd58885269081903dc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a29f52897bd8e15c93884d843555bd7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cca433260b7cf14e30258592ce007fe2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/da9b6ba4-071b-4572-a977-0deef266879f.png?resizew=135)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc26eda15abd72b7efe68af47639a5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ce735bef8c7fc6a1ddcebd449e38f7e.png)
您最近一年使用:0次
2020-02-18更新
|
422次组卷
|
2卷引用:2020届广西河池市高三上学期期末考试数学(理)试题
名校
解题方法
6 . 如图,在四棱锥
中,
,
,
,
,
分别为
的中点,
.
![](https://img.xkw.com/dksih/QBM/2020/2/16/2400372945534976/2401239919378432/STEM/14241bbd-e1d3-4009-b15b-93779d3d342a.png)
(1)求证:
平面
;
(2)求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8662205622d3b0c8dbfc543c64188f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d65595a75b4d7f448c0424aa2169be18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377b5f7197e5bd1afeea4d931307956a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95a078495ba47076ccaa28b46f765d80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cae57e90e373d68c5550a7e258bfbe22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a29f52897bd8e15c93884d843555bd7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cca433260b7cf14e30258592ce007fe2.png)
![](https://img.xkw.com/dksih/QBM/2020/2/16/2400372945534976/2401239919378432/STEM/14241bbd-e1d3-4009-b15b-93779d3d342a.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc26eda15abd72b7efe68af47639a5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
(2)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8662205622d3b0c8dbfc543c64188f0.png)
您最近一年使用:0次
2020-02-17更新
|
1052次组卷
|
4卷引用:2020届广西河池市高三上学期期末考试数学(文)试题
7 . 已知矩形
中,
,E,F分别为
,
的中点.沿
将矩形
折起,使
,如图所示.设P、Q分别为线段
,
的中点,连接
.
![](https://img.xkw.com/dksih/QBM/2020/4/10/2438548162363392/2439171394994176/STEM/bf029489ade44323960f9163f30df558.png?resizew=253)
(1)求证:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0041488020a3e19377b18a70fbf82e7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/946c16d99496d31ce4d87301a4793393.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4951b4ff78df3194a18e8daeb09e6171.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://img.xkw.com/dksih/QBM/2020/4/10/2438548162363392/2439171394994176/STEM/bf029489ade44323960f9163f30df558.png?resizew=253)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9abe6e8d1f4f1e8bdc46ddbae0cd789.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ab8a10e675354fa0c6e7da3d06b999d.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/445b51117626fbd3373e32acc514c64b.png)
您最近一年使用:0次
8 . 在四棱锥
中,
平面ABCD,
是正三角形,AC与BD的交点为M,又
,
,点N是CD中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/a0e20358-7202-4426-8f38-1fa39294a22b.png?resizew=175)
(1)求证:
平面PAD;
(2)求点M到平面PBC的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9a4950a6e4202efd609507964af238b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd95dc30c0344788b94289c464a3158e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/a0e20358-7202-4426-8f38-1fa39294a22b.png?resizew=175)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
(2)求点M到平面PBC的距离.
您最近一年使用:0次
2019-09-30更新
|
258次组卷
|
3卷引用:2020届广西柳州高级中学高三下学期开学考试数学(文)试题
9 . 如图,在三棱柱
中,每个侧面均为正方形,D为底边AB的中点,E为侧棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/690e3c36-4966-48fc-a480-817bafc74de4.png?resizew=133)
(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/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/690e3c36-4966-48fc-a480-817bafc74de4.png?resizew=133)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecaf8d068559d90824eb43b9c252a320.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/641d9688e81760c02d0dfc4ba015afb1.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4560fa4ad459b58b723c74bd24e51ebf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/641d9688e81760c02d0dfc4ba015afb1.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89ed2e9022245de3a54401f7297986c2.png)
您最近一年使用:0次
2020-01-04更新
|
427次组卷
|
2卷引用:2020届西大附中高三12月月考数学(文)试题
10 . 如图,已知菱形
和矩形
所在的平面互相垂直,
.
![](https://img.xkw.com/dksih/QBM/2019/12/28/2364671997214720/2367259009867776/STEM/22fb21eb840c478591c0eba6f61e26d3.png?resizew=335)
(1)若
为
的中点,求证:
平面
;
(2)若图中七面体的体积为
,且
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bbc56d42b003cbcb1fbe5c50e55b26b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/030b985a2fdc0a7fc22831a700e77d0c.png)
![](https://img.xkw.com/dksih/QBM/2019/12/28/2364671997214720/2367259009867776/STEM/22fb21eb840c478591c0eba6f61e26d3.png?resizew=335)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e2fef2c0e49ecae8688ca60802310e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae8768996ca9a0f2c5d9a19abbd54df.png)
(2)若图中七面体的体积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f83dbfddc6f98548699ed581e8c8608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d4e574c9d139615d991a168cfbf63b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
您最近一年使用:0次
2019-12-31更新
|
407次组卷
|
4卷引用:2020届西大附中高三9月月考数学(文)试题