解题方法
1 . 如图,在三棱锥S﹣ABC中,SA=SB=AC=BC=2,
,SC=1,D,E分别为SA,AB的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/15e27ec0-6071-4c8a-b434-c31b44e4e949.png?resizew=167)
(1)求证:DE
平面BCS;
(2)求三棱锥S﹣ABC的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/15e27ec0-6071-4c8a-b434-c31b44e4e949.png?resizew=167)
(1)求证:DE
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
(2)求三棱锥S﹣ABC的体积.
您最近一年使用:0次
2022-12-16更新
|
279次组卷
|
3卷引用:四川省绵阳市开元中学2021-2022年学年高一下学期期末适应性质量检测理科数学试题
四川省绵阳市开元中学2021-2022年学年高一下学期期末适应性质量检测理科数学试题四川省绵阳市开元中学2021-2022年学年高一下学期期末适应性质量检测文科数学试题(已下线)专题四 期末高分必刷解答题(32道)-《考点·题型·密卷》
2 . 如图,在三棱锥
中,
,点
分别是
的中点,
底面
.
![](https://img.xkw.com/dksih/QBM/2022/11/20/3113866250829824/3116714997489664/STEM/42dedfbcbb0843afa4fec997d3629d98.png?resizew=187)
(1)求证:
平面
;
(2)求直线
与平面
所成角的正弦值大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3458ac2f57ca59ad8052807621cf0ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe964aa3574061970c9c8066df21c89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a76d097f3d2a6cf2c76b1e3f41dfe7fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbc6f007dbf1c1a36eb031e520608403.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/2022/11/20/3113866250829824/3116714997489664/STEM/42dedfbcbb0843afa4fec997d3629d98.png?resizew=187)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377ca47ae9b5ea2a870b6c0b12cfa010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
2022-11-24更新
|
127次组卷
|
2卷引用:四川省安岳县石羊中学2022-2023学年高二上学期期中检测数学理科试题
名校
解题方法
3 . 如图所示,在直三棱柱
中,
,
平面
,D为AC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/b876a8e6-620b-40d4-8d93-48954da365c6.png?resizew=194)
(1)求证:
平面
;
(2)求证:
平面
;
(3)在
上是否存在一点E,使得
,若存在,试确定E的位置,并判断平面
与平面
是否垂直?若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d33ebce3dd8905d4f954015823fa480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cdf60b46965a33b15fec40f733d9c0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d1d2e0f281222a5f289ea4008370aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/b876a8e6-620b-40d4-8d93-48954da365c6.png?resizew=194)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac5ea494bb75a5c04e61c9e32aceabc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a59d296654aa17749f8300ae1d1da0e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
(3)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/330dbdf94bfd6490f872cd93589db154.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
您最近一年使用:0次
名校
解题方法
4 . 如图,在四棱锥
中,
平面
,
,
,
,
,
是
的中点,
在线段
上,且满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/ebaee7e4-9dc2-4daa-8fa5-900d949b3f3e.png?resizew=163)
(1)求证:
平面
;
(2)求点
到平面
距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/ee8ef58be8708144272538ee427fb92c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beb30f1aa1c1c1fe2ca77e30e54b5fcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/559470787fd107b8781b8be7e831535d.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c369cae5738730a8af7cf1ab80159498.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/ebaee7e4-9dc2-4daa-8fa5-900d949b3f3e.png?resizew=163)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063510e3c1fb6a7ccc3b8e3e3c7d660e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
2022-11-16更新
|
830次组卷
|
5卷引用:四川省南充市2022-2023学年高三高考适应性考试(零诊)文科数学试题
5 . 如图,在几何体
中,四边形
为梯形,四边形
为矩形,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/98b370e6-f931-4727-8aff-d7f3e2a0e5b4.png?resizew=214)
(1)求证:平面
平面
;
(2)求三棱锥
与四棱锥
的体积的比值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7f3945a73fd0c0e94b59bb747495fc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb55b4b96849ab53b0cb97332801b86d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eff0db05826cbff651faf0144904b32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/756b4c94066113c0598ee0abf529173f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/98b370e6-f931-4727-8aff-d7f3e2a0e5b4.png?resizew=214)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b61cb6f9db386066ddf8f9d57e4f705f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d29cb5378e5b19495cbe6ef57ebce79.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8367197fee8e0e8bdee11b5b783821c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b725aa69d67ef3973147fbd0a4a6bbf.png)
您最近一年使用:0次
2022-12-04更新
|
325次组卷
|
2卷引用:四川省成都市成都市石室中学2022-2023学年高三上学期期中数学文科试题
解题方法
6 .
是正三角形,
和
都垂直于平面
,且
,
,
分别是
和
的中点.求证:
平面
;
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa3b1722b100297f2fa8fad62423149d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede69346d90f2c2c7d738d90c6aa60a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cf33d73483c93f24cc6a1d76ef22ca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d88d863bbe0a300e8c2f464574c4f5e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10b9c913de19bd5d9a0a67d88ff1371f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
名校
解题方法
7 . 如图,三棱锥
及其正视图与俯视图如图所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/c32c6e98-b0c0-4741-bb35-7f8aba46eb4f.png?resizew=136)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/c58890d6-8760-49f0-859d-ce0e19e3c147.png?resizew=187)
(1)求证:
;
(2)求
点到平面
的距离
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/c32c6e98-b0c0-4741-bb35-7f8aba46eb4f.png?resizew=136)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/c58890d6-8760-49f0-859d-ce0e19e3c147.png?resizew=187)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1e4b16c2c6c9bd089da78122e9d2511.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
您最近一年使用:0次
8 . 如图,在四棱锥
中,底面
是矩形,
是
的中点,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/91fa983f-007b-4abc-b7ca-5029591f172f.png?resizew=189)
(1)求证:平面
平面
;
(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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f7898f562dffdf08263bfb0873e0691.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03bb46e45e9c26b15d53a5dc53185aca.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/91fa983f-007b-4abc-b7ca-5029591f172f.png?resizew=189)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a3fd5284e160896f07ce367645fd04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2022-11-27更新
|
1399次组卷
|
7卷引用:四川省达州中学2022-2023学年高二上学期第三次月考理科数学试题
名校
解题方法
9 . 如图,在四棱锥
中,底面ABCD为菱形,E,F分别为SD、BC的中点.
(1)证明:
平面SAB;
(2)若平面SAD⊥平面ABCD,且
是边长为2的等边三角形,
.求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/24/d0c9301d-4e9f-44b8-86c4-71fd4f720151.png?resizew=169)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
(2)若平面SAD⊥平面ABCD,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f868746f53fd105432d3558ae11df90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eee296a7d9fba487f1485c61580196f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
您最近一年使用:0次
2023-05-23更新
|
747次组卷
|
2卷引用:四川省泸州市2022-2023学年高二上学期期末考试文科数学试题
解题方法
10 . 如图,在平行四边形
中,
,将
沿
折起到
的位置,使平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/678122b7-83a2-40a4-af3e-c99bd9041c81.png?resizew=232)
(1)求证:
;
(2)求三棱锥
的表面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e07e8d90de1939b379cee1903af94e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73636989e83905f8800a865c2b608c43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b96715995549e5e48494101570bb3bb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e54cf75bbfc9db93d27937c8b8e977b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/678122b7-83a2-40a4-af3e-c99bd9041c81.png?resizew=232)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9874eca4abea481fa84eb772a920f9c7.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52753d89bf58589e2e83b19bd3d140b8.png)
您最近一年使用:0次