解题方法
1 . 如图,在直三棱柱
中,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/28/6d37a47f-077b-4525-8dc4-874fad7337b3.png?resizew=169)
(1)求证:
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cbf225d5b011f6a79642a3def3e05db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac34466d49ce1fe5dd29d02f02e5cd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/28/6d37a47f-077b-4525-8dc4-874fad7337b3.png?resizew=169)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02cb62f4c1e0e023619922eb8a509c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b886daa3c9bb7153acd9f651f99eb2c1.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0d9afa28d00f88cfa342fb72ee85c45.png)
您最近一年使用:0次
名校
解题方法
2 . 如图所示,在四棱锥
中,底面
是边长为4的正方形,
,点
在线段
上,
,点
分别是线段
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/3/744d2351-63e3-42ff-8fa2-c33b85798193.png?resizew=189)
(1)证明:
平面
;
(2)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/d3e05b6d03d24f932d6df32afe14aa79.png)
![](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/eae25bdfe94839f26e9a151d33e44723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cf33d73483c93f24cc6a1d76ef22ca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/481e426224c3a3ce9bb5a731eed81c40.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/3/744d2351-63e3-42ff-8fa2-c33b85798193.png?resizew=189)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9bbc7e0de28c652ae10a8db5b4e2687.png)
您最近一年使用:0次
2022-07-02更新
|
547次组卷
|
4卷引用:河北省沧州市2021-2022学年高一下学期期末数学试题
解题方法
3 . 如图,在正方体
中,
分别为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/4/0e5377cd-06ee-4056-b69f-06ce46042d85.png?resizew=151)
(1)证明:
平面
.
(2)若
,求四棱锥
的体积.
![](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/a9a3c176cd586a25166fac58af2e43ea.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/4/0e5377cd-06ee-4056-b69f-06ce46042d85.png?resizew=151)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679748eab882a6be0fefd2cc300349a4.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f067183ddb143d5a2473ea7ab90ad7ae.png)
您最近一年使用:0次
2022-07-02更新
|
515次组卷
|
2卷引用:河北省保定市2021-2022学年高一下学期期末数学试题
名校
解题方法
4 . 如图,在边长为
的菱形
中,
,现将
沿
边折到
的位置,使得平面
平面
.
![](https://img.xkw.com/dksih/QBM/2021/1/7/2630910302773248/2633055935094784/STEM/faec49d9-c939-4f62-8d00-0bf8566a25f4.png?resizew=312)
(1)求证:
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a58a622e2b1a239f2f96aa1501e9799.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9524e3810e06dc781285f1289e75d653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1095b030f441de5fb223781b00f3dd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/2021/1/7/2630910302773248/2633055935094784/STEM/faec49d9-c939-4f62-8d00-0bf8566a25f4.png?resizew=312)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccbd1316b9d1f0c1e71fd078deec61f6.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
您最近一年使用:0次
2021-01-10更新
|
321次组卷
|
3卷引用:河北省秦皇岛市昌黎文汇学校2022-2023学年高一下学期期末数学试题
解题方法
5 . 在三棱柱
中,侧面
是菱形,
,平面
平面
,
为
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/5013d75a-179f-4286-8a05-f9d409a9f5f1.png?resizew=194)
(1)证明:
平面
;
(2)若
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8b5a6dbcf05f572f83f51abf7d668c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be445f94888b34161b6d59d458928e35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8b5a6dbcf05f572f83f51abf7d668c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/5013d75a-179f-4286-8a05-f9d409a9f5f1.png?resizew=194)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8bfe2553e852df73185d017c0a62fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b8372f6eba66a0bd3587106daaf68d1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9332278351ab92e03e984e9279dd06a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2782b3484d5a8e544f2281c8358de9d0.png)
您最近一年使用:0次
2020-10-19更新
|
200次组卷
|
5卷引用:【市级联考】河北省唐山市2019届高三上学期期末考试A卷数学试题
【市级联考】河北省唐山市2019届高三上学期期末考试A卷数学试题北京市昌平区新学道临川学校2019-2020学年高三上学期期末数学(文)试题(已下线)考点21 空间几何体的面积与体积-2021年高考数学三年真题与两年模拟考点分类解读(新高考地区专用)(已下线)专题16 立体几何-2020年高考数学母题题源解密(北京专版)(已下线)专题10 必拿分题目强化卷(第一篇)-备战2021年新高考数学分层强化训练(北京专版)
解题方法
6 . 如图所示,在四棱锥
中,
平面
,
,
,
是
的中点,
是
上的点,且
,
为
中
边上的高.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/c6fa7b43-f150-4e19-822f-a0cfacd6942a.png?resizew=204)
(1)证明:
平面
;
(2)若
,
,
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba4c15fb8fc3239d45bd4e7d8971f58e.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c9a3fbf5d6e3e9586dcb8c6c7e0c489.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d58f9019097bd05037aefd5c322916.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e2903ff33266528a7902ad51cf8d75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/c6fa7b43-f150-4e19-822f-a0cfacd6942a.png?resizew=204)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b17622ea6f6f5afd1ad817a557e5889d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39d773180e830c8a01294827ff81091b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a7ee687c3ad4a6e97315491c619fc94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/199098479c92e87304b91871172d46e0.png)
您最近一年使用:0次
7 . 如图,在三棱柱
中,侧面
是边长为2的正方形,点
是棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/60948fe4-8aec-4a1f-a8a3-022ec3eb5681.png?resizew=166)
(1)证明:
平面
.
(2)若三棱锥
的体积为4,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/986ba572d8373df48c996f8c8611498c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/937b9e610b548398bc46ed29951e7f74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/60948fe4-8aec-4a1f-a8a3-022ec3eb5681.png?resizew=166)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d46554105150391e671609fc6348a18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc46688d8723cf2003fc25890265200.png)
(2)若三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05925f665156215b1e031ea6c190616a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/937b9e610b548398bc46ed29951e7f74.png)
您最近一年使用:0次
2019-07-18更新
|
846次组卷
|
4卷引用:河北省定州市2018-2019学年高一下学期期末考试数学试题
河北省定州市2018-2019学年高一下学期期末考试数学试题河北省博野中学2019-2020学年高一下学期6月月考数学试题人教B版(2019) 必修第四册 过关斩将 第十一章 立体几何初步 本章达标检测(已下线)高一数学下学期第二次月考-2021-2022学年高一数学考试满分全攻略(人教A版2019必修第二册)
8 . 在四棱锥
中,底面
是梯形,
,
,
,
,平面
平面
,
在棱
上且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/12e6d962-5fe0-4a62-aed4-118870d62387.png?resizew=212)
(1)证明:
平面
;
(2)若
是正三角形,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/68d31600cba2d5256c7e78b6122d6755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a0e5697eca3f5205cb7b343648240bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5441d73845911db1993bf903c4d8700f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/430b77d8d2a99713b192dc729ddc2275.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19ad6a0124359e8b9f7649cf0bff51ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/1b384315ba84cafb978ef3619c8162b5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/12e6d962-5fe0-4a62-aed4-118870d62387.png?resizew=212)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c372d059202ec388960b125d4a87dc84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecc34a42e6838de94da6dc08e0b578cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10b7f53c57025ae134e1a09b6f00192f.png)
您最近一年使用:0次
解题方法
9 . 如图所示,在长方体
中,
,
,连接
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/f18a052a-7aea-4791-b601-843b047c93bb.png?resizew=172)
(1)求证:
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829018a6ca0aff95d89e3f7cd943274e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41fd676c41d2d644928f014b0fea4689.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/f18a052a-7aea-4791-b601-843b047c93bb.png?resizew=172)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01676a558e64ef15c9afacbc7acda293.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db4c18aba9681a8475968248764d4c3a.png)
您最近一年使用:0次
解题方法
10 . 如图,在三棱柱
中,侧棱
底面
,
,
为
的中点,
.
(1)求证:
平面
;
(2)若
,求三棱锥
的体积.
![](https://img.xkw.com/dksih/QBM/2016/3/18/1572545936998400/1572545943109632/STEM/16276042b3ff4023879135abbdc617ac.png?resizew=252)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4339a40ae9d1947ec3a4b3e2fa3a16cd.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1496afecd92a619fbe5e9b736f06f4e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a935b7d21a103a264b6e96ecf82dbe4a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0de862e4e5475490e0229fb32f826046.png)
![](https://img.xkw.com/dksih/QBM/2016/3/18/1572545936998400/1572545943109632/STEM/16276042b3ff4023879135abbdc617ac.png?resizew=252)
您最近一年使用:0次