名校
解题方法
1 . 如图,在三棱柱
中,侧棱
底面
,
,
,
、
分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/2022/5/6/2973578039050240/2974952549974016/STEM/23a437f9-0766-410e-8a40-147337ab112b.png?resizew=188)
(1)证明:
平面
;
(2)试探究三棱锥
的体积与三棱锥
的体积之比是否为定值,若是定值,再进一步求出此定值;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ecbfc700f5b996ac9b689e6dfa48a87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d97e150793ad48c641db0cc74aaa341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebbe2ffa2eaf64721abf61e5545cf1a5.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655cc150ddc9deba2254780984d0024.png)
![](https://img.xkw.com/dksih/QBM/2022/5/6/2973578039050240/2974952549974016/STEM/23a437f9-0766-410e-8a40-147337ab112b.png?resizew=188)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38b87777526f344ab7d7af4b16591131.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(2)试探究三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/becc01065291effc34c25b261c512bdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dfe6c18e5f060805c7fe2ed2592679a.png)
您最近一年使用:0次
2022-05-08更新
|
669次组卷
|
4卷引用:广西南宁市第二中学2022届高三5月诊断数学(文)试题
2 . 如图,在四棱锥
中,底面
是矩形,
,
,
为
的中点,点
为底边
上的点,
,
.
![](https://img.xkw.com/dksih/QBM/2022/4/19/2961588787855360/2962488422260736/STEM/234d1938-c2fe-4b5c-9efc-394ea175f206.png?resizew=223)
(1)证明:平面
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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/526908dfb46cf151b8ab1492a9d52047.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860c4c9419ebfa927b3f3ea14e4f4784.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee98a0cb286c6323b0285e021024d4e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ab841b2f2dc53a260688f571cfb374.png)
![](https://img.xkw.com/dksih/QBM/2022/4/19/2961588787855360/2962488422260736/STEM/234d1938-c2fe-4b5c-9efc-394ea175f206.png?resizew=223)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc532cfe64300cb3da9e04a307c957a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b6b399930214195326d9c0e6b430ee2.png)
您最近一年使用:0次
名校
解题方法
3 . 如图,在三棱柱
中,
平面ABC,
,
,
,点D,E分别在棱
和棱
上,且
,
,M为棱
的中点.
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8bfe2553e852df73185d017c0a62fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209acf15985d1ea1ad86fc4a37e38c0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d8cb98c0adee7ca698d8b17dacb845b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a0268d04b9dea7629af27af9a0285a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8973bcb7d87303a0b5fba04a801019b9.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/537b25d7d8d13a6ef990c7c370def871.png)
您最近一年使用:0次
2022-06-10更新
|
1519次组卷
|
8卷引用:广西2023届高三上学期开学摸底考试数学(文)试题
广西2023届高三上学期开学摸底考试数学(文)试题广西柳州市鹿寨县鹿寨中学2023届高三上学期开学摸底考试数学(文)试题黑龙江省哈尔滨市第九中学校2022届高三第三次模拟考试数学(文科)试题(已下线)专题31 直线、平面垂直的判定与性质-1内蒙古赤峰市2021-2022学年高一下学期期末考试数学(文)试题(已下线)8.6.2 直线与平面垂直(1) -2022-2023学年高一数学《考点·题型·技巧》精讲与精练高分突破系列(人教A版2019必修第二册)(已下线)第06讲 空间直线﹑平面的垂直(一)-《知识解读·题型专练》(已下线)第十一章:立体几何初步章末重点题型复习(2)-同步精品课堂(人教B版2019必修第四册)
4 . 如图,四棱锥
中,
,
,
,
,侧面
是以
为斜边的等腰直角三角形.
![](https://img.xkw.com/dksih/QBM/2021/12/26/2880812221956096/2885881521111040/STEM/fa44ae58-dc81-459d-8c48-d997f1f45922.png?resizew=178)
(1)求证:
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd6a2b112facda441f4e34bf5c145fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9a52a61b3bb234afcb2e5d5e77c1001.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2021/12/26/2880812221956096/2885881521111040/STEM/fa44ae58-dc81-459d-8c48-d997f1f45922.png?resizew=178)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/746f70c9993f04a5037c53daf3d1af00.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
您最近一年使用:0次
解题方法
5 . 如图,在三棱柱
中,平面
平面
,
平面
,
.
![](https://img.xkw.com/dksih/QBM/2022/4/13/2957149452943360/2958088611946496/STEM/5682f91e-d3fc-4e8e-80a4-2397d0de1971.png?resizew=181)
(1)若
,求证:
;
(2)若四棱锥
的体积是
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0671b4776e142e17a79af5b3f0378ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.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/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://img.xkw.com/dksih/QBM/2022/4/13/2957149452943360/2958088611946496/STEM/5682f91e-d3fc-4e8e-80a4-2397d0de1971.png?resizew=181)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e97770c3777724f1682b555371e9277.png)
(2)若四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10945fc371bb860d675088f01b491720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
您最近一年使用:0次
名校
解题方法
6 . 如图所示的四棱锥
中,底面ABCD为正方形,平面
平面ABCD,点O,M,E分别是AD,PC,BC的中点,
,
.
![](https://img.xkw.com/dksih/QBM/2022/3/4/2928971824021504/2930617099264000/STEM/f178a283-03c7-456f-a3ae-6819dd3db651.png?resizew=188)
(1)求证:
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/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62974d34de3a12418d6b700420afd1b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c2173e7e6738c4f28d7dd61ef81d03d.png)
![](https://img.xkw.com/dksih/QBM/2022/3/4/2928971824021504/2930617099264000/STEM/f178a283-03c7-456f-a3ae-6819dd3db651.png?resizew=188)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f84e995fae3d235a050d29d5f271f1c.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e682db81a82443f63a567eb29f4aa7bc.png)
您最近一年使用:0次
2022-03-06更新
|
969次组卷
|
5卷引用:广西玉林市、贵港市2022届高三12月模拟考试数学(文)试题
解题方法
7 . 多面体ABCDE中,
与
均为边长为2的等边三角形,
为腰长为
的等腰三角形,平面CDE⊥平面BCD,平面ABC⊥平面BCD,F为BC的中点.
![](https://img.xkw.com/dksih/QBM/2022/3/17/2938261308194816/2939536057221120/STEM/3d438cce977a463e9d316abfb54d8559.png?resizew=186)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
平面ECD;
(2)求多面体ABCDE的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50690dab38f4512eb72e18b7f86cf6f6.png)
![](https://img.xkw.com/dksih/QBM/2022/3/17/2938261308194816/2939536057221120/STEM/3d438cce977a463e9d316abfb54d8559.png?resizew=186)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
(2)求多面体ABCDE的体积.
您最近一年使用:0次
2022-03-19更新
|
719次组卷
|
2卷引用:广西桂林市联盟校2023届高三上学期9月入学统一检测数学(文)试题
解题方法
8 . 在平行四边形
中,
,
,过点A作CD的垂线交CD的延长线于点E,
,连接EB交AD于点F,如图①,将
沿AD折起,使得点E到达点P的位置,如图②.
平面
;
(2)若G为PB的中点,H为CD的中点,且平面
平面ABCD,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6166b9a5437671bcba31e17c375eb39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cdb19af3fe72be6542fb0d94f285b2.png)
(2)若G为PB的中点,H为CD的中点,且平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16b77a5c3865855fbb3d24f9522ced8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48769011a648f0b274a3f1acb8531758.png)
您最近一年使用:0次
名校
9 . 如图,在四棱锥
中,
平面ABCD,
,
,且
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2022/5/19/2982645852889088/2985659018854400/STEM/1dc39f2f-1571-41c1-900d-cd4ac59731f8.png?resizew=187)
(1)求证:
;
(2)在线段PD上是否存在一点M,使二面角
的余弦值为
?若存在,求三棱锥
体积;若不存在,请说明理由.
![](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/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7788830ed1cb3b9c5988f70f43595f2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://img.xkw.com/dksih/QBM/2022/5/19/2982645852889088/2985659018854400/STEM/1dc39f2f-1571-41c1-900d-cd4ac59731f8.png?resizew=187)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bafa8c14100a4f847b41b9148954116c.png)
(2)在线段PD上是否存在一点M,使二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/698335f4880c7a298f4898c83b6562bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55176f6357df50f85d36b732e31972d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5d90f940f5693b22ddf2e7c761887d8.png)
您最近一年使用:0次
2022-05-23更新
|
328次组卷
|
2卷引用:广西南宁市第二中学2022届高三5月诊断数学(理)试题
10 . 如图,AB是圆O的直径,
圆O所在的平面,C为圆周上一点,D为线段PC的中点,
,
.
![](https://img.xkw.com/dksih/QBM/2022/1/17/2896502953730048/2897116802908160/STEM/a475c4a9-e78c-4fef-b232-d10c826b234d.png?resizew=207)
(1)证明:平面
平面PBC.
(2)若
,求三棱锥B-ACD的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ca0b614cdcebac47b434db4aa75b518.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ff7ad82b0938145af6a5ffa2c9596d8.png)
![](https://img.xkw.com/dksih/QBM/2022/1/17/2896502953730048/2897116802908160/STEM/a475c4a9-e78c-4fef-b232-d10c826b234d.png?resizew=207)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
您最近一年使用:0次
2022-01-18更新
|
772次组卷
|
4卷引用:广西桂林市、梧州市2022届高三高考联合调研(一模)数学(文)试题