解题方法
1 . 如图,在四棱锥
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/666881aae4dfa006eebae4f8b22529ee.png)
![](https://img.xkw.com/dksih/QBM/2021/5/18/2723536581730304/2725130778378240/STEM/32f04070-95ba-4aa0-b44e-79abcfe6cbef.png?resizew=211)
(1)证明
.
(2)若平面
平面
,经过
的平面
将四棱锥
分成的左、右两部分的体积之比为
,求平面
截四棱锥
的截面面积
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/666881aae4dfa006eebae4f8b22529ee.png)
![](https://img.xkw.com/dksih/QBM/2021/5/18/2723536581730304/2725130778378240/STEM/32f04070-95ba-4aa0-b44e-79abcfe6cbef.png?resizew=211)
(1)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ffa172aa0386aaa78baea0281db6df3.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/306b9504b52df5ad6697fa87200e8a44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e85c4f79e01e2bf9994aee0ae3097ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65436512ecbaefba4ac8123c55094211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d65e051e943ab28fa57aee2fb57994.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
您最近一年使用:0次
2021-05-20更新
|
323次组卷
|
4卷引用:山西省晋中市新一双语学校2021届高考模拟数学(文)试题
山西省晋中市新一双语学校2021届高考模拟数学(文)试题河南省2021届高三仿真模拟考试数学(文科)试题安徽省皖淮名校2020-2021学年高二下学期5月联考文科数学试题(已下线)第九章 立体几何专练4—简单几何体的表面积与体积2-2022届高三数学一轮复习
解题方法
2 . 如图①,在
中,
,
,
.
,
两点分别在
,
上,使得
.现将
沿
折起(如图②),使得平面ADE⊥平面
.
![](https://img.xkw.com/dksih/QBM/2020/11/24/2599866168188928/2605761786159104/STEM/45c9da83b711487892774fed07ae3572.png?resizew=457)
(1)证明:
;
(2)当
为何值时,三棱锥
的体积
最大?并求出最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad4c0ba3a6750537789844d0ec419d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a26bdcb9f99e3810dddf5043a9ba4786.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c42bce098904b241986bb91c65ab33.png)
![](https://img.xkw.com/dksih/QBM/2020/11/24/2599866168188928/2605761786159104/STEM/45c9da83b711487892774fed07ae3572.png?resizew=457)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84be64d28b1623e71ad989f37336b1f2.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf81f142b84adcf278b51c62c88e6afc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
您最近一年使用:0次
名校
解题方法
3 . 如图,四棱柱
中,
平面ABCD,四边形ABCD为平行四边形,
,
.
![](https://img.xkw.com/dksih/QBM/2020/3/21/2424317855318016/2424448709246976/STEM/b4ede81e2f6648d48dbb7f3c81af81cf.png?resizew=209)
(1)若
,求证:
//平面
;
(2)若
,且三棱锥
的体积为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5178fcc1a040999563466fd69ed8b69a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b0382c28547d3834ca71f3f0677695.png)
![](https://img.xkw.com/dksih/QBM/2020/3/21/2424317855318016/2424448709246976/STEM/b4ede81e2f6648d48dbb7f3c81af81cf.png?resizew=209)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a23f01af749100e1888bba06268843db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172e5fbd9df8b19e0786fad909d36d63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a52848aff08399a36f217356007a4b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8244ef04c4aeac06d08c5e848b64d0fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93ecad355286188fd317939fa50f9555.png)
您最近一年使用:0次
2020-03-21更新
|
723次组卷
|
6卷引用:山西省大同市第一中学2020届高三下学期2月命制数学(文)试题
解题方法
4 . 如图,
是正方形,
平面
,
平面
,
,
.
![](https://img.xkw.com/dksih/QBM/2020/3/16/2420868369448960/2422101194481664/STEM/e1bb1bcde6d641f592400ab0ee94fc42.png?resizew=125)
(1)求证:
;
(2)若三棱锥
的体积为
,几何体
的体积为
,且
,求
的值.
![](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/44b190c8d3d7d7d0e6e959e8a52eae90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b59f0e6f7fa9c50e7f5cc146ba1af1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a50ea6c747f9158667b8398178ae5d17.png)
![](https://img.xkw.com/dksih/QBM/2020/3/16/2420868369448960/2422101194481664/STEM/e1bb1bcde6d641f592400ab0ee94fc42.png?resizew=125)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d603566c74b1d5de510a2e8f7859010.png)
(2)若三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50ea1efba56e577f2a289b4be22bbc73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4764374bd2fb78e59cd0b283637baeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e44deccf166f84cc4049a036acf31108.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63055a5d6916f99d07fede49120753f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9909950cb8f12b0b304cffd51da8cba7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
名校
解题方法
5 . 如图:已知直三棱柱
中,
D为BC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/22/3a45bc94-1069-4270-87db-f6289a26f895.png?resizew=111)
(1)求证:
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41104641f3e2260d00aeadf8fb8a078a.png)
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b17ea0ffe7a54685ddfd142bbef4b1ed.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/22/3a45bc94-1069-4270-87db-f6289a26f895.png?resizew=111)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ebe6a446b91e73b181f9f4d56264dd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41104641f3e2260d00aeadf8fb8a078a.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51bf5b9fa4c861b5049c3d8ff9efb990.png)
您最近一年使用:0次
2020-04-09更新
|
440次组卷
|
2卷引用:山西省实验中学2018-2019学年高二上学期期中数学试题
6 . 如图:三棱锥
中,底面
是边长为4的正三角形,
,
,面
面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/34471b38-eccd-484b-aeac-698577880801.png?resizew=153)
(1)求证:
;
(2)求点
到面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb96e0331eebe80ed1ff610faf531fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89b336e518ac4ff04c6c26e4b8a15844.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/34471b38-eccd-484b-aeac-698577880801.png?resizew=153)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bbd7c2767c106faf27d6a97ebc8e739.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
7 . 如图,四边形
是边长为2的正方形.
平面
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/fc8089ef-05e8-4678-b956-8a0ecca20132.png?resizew=110)
(1)求证:平面
平面
.
(2)线段
上是否存在一点
,使三棱锥
的高
若存在,请求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1364213f546b37f8764ddcb59e36ae4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/fc8089ef-05e8-4678-b956-8a0ecca20132.png?resizew=110)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5f5b538bcfb898fcc9d3a2dd8a1b080.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fe079e1c5dfd3416b628ea2c399f7b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb9a9917e36391c5141f22ca6b5fed5f.png)
您最近一年使用:0次
2020-04-27更新
|
370次组卷
|
4卷引用:山西省长治市第二中学校2021届高三上学期9月质量调研数学(文)试题
解题方法
8 . 如图,几何体
中,平面
//平面
,
平面
,
,
∥
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/10/74b8495e-d0e1-4e7b-a5cc-e1c7f07823cd.png?resizew=151)
(1)证明:
∥平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3df0d9a6c83b35a863544a01f22ef7.png)
(2)求该几何体的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c1c29b253c77a3c423af13abb8c7369.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d57da13f31660df8090c16e90ec62953.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b8cbde98d09c06d2cc5481c6a8fbad8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/843b6577954f710280decc63dd0f5471.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/10/74b8495e-d0e1-4e7b-a5cc-e1c7f07823cd.png?resizew=151)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3df0d9a6c83b35a863544a01f22ef7.png)
(2)求该几何体的体积.
您最近一年使用:0次
名校
9 . 如图,在直三棱柱
中,
,
是
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/257aea6a-d5ae-426c-9497-8ec72e5d0c1d.png?resizew=182)
(Ⅰ)求证:
平面
;
(Ⅱ)异面直线
和
所成角的余弦值为
,求几何体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bec963b2e3ec0068e76d9b11ae43e73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f9bc72bd5bc8850539f0c32bc4111b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/257aea6a-d5ae-426c-9497-8ec72e5d0c1d.png?resizew=182)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1c920d02068d0e63ffdab70786c526d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bca84ad86c648d3bb20c8909c8da3f.png)
(Ⅱ)异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969c9c2ce59a95882e3e19dce4be1529.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e73e5e4865e8eeb874d7f9fb638f546.png)
您最近一年使用:0次
2020-01-31更新
|
881次组卷
|
5卷引用:2020届山西省太原市高三下学期模拟测试 (三)数学(文)试题
解题方法
10 . 如图,四棱锥
的底面为平行四边形,平面
平面ABCD,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2020/7/3/2498163982155776/2500057368231936/STEM/a014cf8c6f4449eba60c566f90e34a8c.png?resizew=318)
(1)证明:
平面PAD,且
.
(2)求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad4c0ba3a6750537789844d0ec419d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a96d8b87b09e3ca52d91b3f24365f251.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88197da08544c0dd0f8fb1359797ac9b.png)
![](https://img.xkw.com/dksih/QBM/2020/7/3/2498163982155776/2500057368231936/STEM/a014cf8c6f4449eba60c566f90e34a8c.png?resizew=318)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08f8b463fcecf0a757f386db56e074d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf6c62979a7aa534a191d8387a741e8.png)
(2)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
您最近一年使用:0次
2020-07-06更新
|
350次组卷
|
3卷引用:山西省2019-2020学年高二下学期6月联考数学(文)试题