2023高三·全国·专题练习
解题方法
1 . 如图,已知正方体
的棱长为
,
、
分别为棱
、
的中点,证明:直线
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ad6b3d073d8dd1cb7d9c89116b9d81.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/21/a7737305-c285-4977-9260-14c0df17a0e5.png?resizew=147)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a8ec2583c364c079a7b1bfb1e8fe0c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ad6b3d073d8dd1cb7d9c89116b9d81.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/21/a7737305-c285-4977-9260-14c0df17a0e5.png?resizew=147)
您最近一年使用:0次
解题方法
2 . 如图,在多面体
中,平面
平面
,
平面
,
和
均为正三角形,
,
.
(1)求多面体
的体积.
(2)在线段
上是否存在点
,使得
平面
?说明理由;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17580410bf63dba4fe164265afaac4cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662698361c6b3ddaf0c28a3c87be53e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75929268210da5976bc37d080da030dd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/7/9ffb5c30-d01b-49fa-a02b-ecebba9e6db3.png?resizew=141)
(1)求多面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8ccd4181f956f6e0140bf0ab8f0716.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
您最近一年使用:0次
3 . 如图在五面体
中,
为等边三角形,平面
平面
,且
,
,
为边
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/5/4ac30e2e-ebde-4b57-94de-e985e22c354d.png?resizew=161)
(1)证明:
平面
;
(2)求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9d54cbbf601f4583659771eb534997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d1e840f087b6e2592948f3b057b4e5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1097344883f12313ec4dec7f3de60c77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/5/4ac30e2e-ebde-4b57-94de-e985e22c354d.png?resizew=161)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a2b5cfae407016cad45bbdefea05833.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
您最近一年使用:0次
解题方法
4 . 如图为一个组合体,其底面
为正方形,
平面
,
,且
.
(1)证明:
平面
;
(2)证明:
平面
;
(3)求该组合体的表面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/b73f874048f9e48ae35ee95bbf443bce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc3b89860bcc3e950f1b21575579d8bb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/9/9dc94746-58f1-43de-bf25-97ba64a153a3.png?resizew=168)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7175df06e33cad4e6bbc3f2f6b0a2986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/564376a88fa74090de9f7694226a6184.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(3)求该组合体的表面积.
您最近一年使用:0次
名校
解题方法
5 . 如图所示的几何体是由等高的
个圆柱和半个圆柱组合而成,点G为
的中点,D为
圆柱上底面的圆心,DE为半个圆柱上底面的直径,O,H分别为DE,AB的中点,点A,D,E,G四点共面,AB,EF为母线.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/8af8d836-1e50-43b9-bcdb-f1e5b4fda145.png?resizew=172)
(1)证明:
平面BDF;
(2)若平面BDF与平面CFG所成的较小的二面角的余弦值为
,求直线OH与平面CFG所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c44512cb86bcf48c6d21357f45b533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/8af8d836-1e50-43b9-bcdb-f1e5b4fda145.png?resizew=172)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97776c09f988638731deef0bad52cb46.png)
(2)若平面BDF与平面CFG所成的较小的二面角的余弦值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83303d3784492506fc44f2b4d6b07bc1.png)
您最近一年使用:0次
2022-11-26更新
|
483次组卷
|
5卷引用:河南省商丘市部分学校2022-2023学年高三上学期11月质量检测理科数学试题
名校
解题方法
6 . 如图,三棱锥
中,平面
平面
,
,点
分别是棱
的中点,点
是
的重心.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/30/1ec5e8b1-53a9-49dd-9a55-18ef99e06ce5.png?resizew=189)
(1)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
平面
;
(2)若
为正三角形,求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3911de744bf54ee5f296c8aef056237.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40c2013527c6089d7df59bca21a4598c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/30/1ec5e8b1-53a9-49dd-9a55-18ef99e06ce5.png?resizew=189)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6818a98204f62c1b16699d26ca0c3f62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e20dda43344207b7bd135e889e2b967.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf4c26f3f4d96117f087400a0f32ece8.png)
您最近一年使用:0次
名校
7 . 如图,正四棱台
中,
,
,
.
(1)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
平面
;
(2)若
,求异面直线
与
所成的角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c55731dcaa0628ad98b3a6bd76e094da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adaf232f9825e5b1cb1ce6df59ed9053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ad7cddb5318cd0016809eb6cf5b5422.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/20/c50e01a7-a4b3-4713-bc65-3b830d5f8fbe.png?resizew=161)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a28d6477c85c5a4ac410a884e92fbe53.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae20f596174c7b5c8684ef09c5381bf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
您最近一年使用:0次
2023-07-16更新
|
268次组卷
|
2卷引用:江西省上饶市2022-2023学年高一下学期期末教学质量测试数学试题
解题方法
8 . 如图,在四棱锥P-ABCD中,底面ABCD为正方形,且侧棱PA⊥底面ABCD,PA=2AD=4.E,F,H分别是PA,PD,AB的中点,点G在线段PD上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/10/dc4417ff-e437-425a-8ff1-28a9da264995.png?resizew=137)
(1)当
时,证明:
平面BEF;
(2)当三棱锥F-EGH的体积为
时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ab4eb7b67537fc062524da78e716db4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/10/dc4417ff-e437-425a-8ff1-28a9da264995.png?resizew=137)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8845fadc307f1d308410e829becedd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96b8c2721ada247b03f41f328539b301.png)
(2)当三棱锥F-EGH的体积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d7abf02717d6e59d8a64a65a87c412.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
9 . 如图,在长方体
中,
,
,
.点
为对角线
的中点.
![](https://img.xkw.com/dksih/QBM/2021/5/14/2720988618948608/2723219581706240/STEM/e314658d-175b-4ced-afeb-f4524319905f.png?resizew=245)
(1)证明:直线
平行于平面
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b856f2a5bdf65dab56eba6f25a75fc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/152236216f8d1cb39b261108e8fc8b9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://img.xkw.com/dksih/QBM/2021/5/14/2720988618948608/2723219581706240/STEM/e314658d-175b-4ced-afeb-f4524319905f.png?resizew=245)
(1)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/981773fc223d7fd6c03ab4aa12455541.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/152236216f8d1cb39b261108e8fc8b9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/981773fc223d7fd6c03ab4aa12455541.png)
您最近一年使用:0次
10 . 已知
为等腰直角三角形,
,
,
分别为
和
上的点,且
,
,如图1.沿EF将
折起使平面
平面
,连接
,
,如图2.
![](https://img.xkw.com/dksih/QBM/2021/9/7/2802926553350144/2803656190033920/STEM/6ab3d0d549a04c9bb12d765487232be3.png?resizew=387)
(1)求异面直线
与
所成角的余弦值;
(2)已知
为棱
上一点,试确定
的位置,使
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08313da7b66283d2e0b3987f3e6761f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1364213f546b37f8764ddcb59e36ae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13bd9e8b54864ca44115d24a5aeeb83c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6501f1c913a4ef64957a2f01ab5baa15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b312dab930cbbb9a4bb1a99f044dab73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2021/9/7/2802926553350144/2803656190033920/STEM/6ab3d0d549a04c9bb12d765487232be3.png?resizew=387)
(1)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd0285afe567ca0b32f0ccafc30167cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20af148464904e21f4374cc8fb886fba.png)
您最近一年使用:0次
2021-09-08更新
|
729次组卷
|
2卷引用:江苏省百校联考2021-2022学年高三上学期第一次考试数学试题