名校
解题方法
1 . 如图,在四棱锥
中,底面
是边长为2的正方形,侧面
是正三角形,且平面
平面
,
为棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/17/e4a8df0f-1a01-4a31-b789-382516f18f82.png?resizew=182)
(1)求证:
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/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.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/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/17/e4a8df0f-1a01-4a31-b789-382516f18f82.png?resizew=182)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e126c16032892966489053f44b9048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ca5b5fd1031438de2d2dd59be8c348.png)
您最近一年使用:0次
名校
2 . 如图,已知长方形
中,
,
,
为
的中点.将
沿
折起,使得平面
平面
.
(1)求证:
;
(2)若点
是线段
上的一动点,问点
在何位置时,二面角
的余弦值为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a88c44f558705de3bcefcfc0ece96b8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f9fba8a4098c1a0515286eb8d616dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bb5012f6c70a1e98d682b6d021fadd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0760712e3e2ea02b755b751e760d0c55.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/804c0e2a375b5f4ff1c420532968efc3.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a5266895d3c1fcb350a745bc779433b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/20/e2b38925-14e6-49c4-af18-03066b6e9cad.png?resizew=363)
您最近一年使用:0次
2017-05-03更新
|
608次组卷
|
3卷引用:河南省豫南九校2016-2017学年高二下学期期中联考数学(理)试题
名校
解题方法
3 . 如图所示,四棱锥
的底面为直角梯形,
,
,
,点
是
的中点.
![](https://img.xkw.com/dksih/QBM/2017/3/27/1652813555171328/1657656693293056/STEM/dc5f42c0c6cf4ca1bfb403585a5fa154.png?resizew=242)
(1)求证:
平面
;
(2)已知平面
底面
,且
,在棱
上是否存在点
,使
?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4ab7e657f01bdfa235f8c4d6681d13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64f1161e0345b3646c71365430dccbb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/2017/3/27/1652813555171328/1657656693293056/STEM/dc5f42c0c6cf4ca1bfb403585a5fa154.png?resizew=242)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7175df06e33cad4e6bbc3f2f6b0a2986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)已知平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75e8973f78fa457fc5477abde35c9d85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06b8fa4cdd66abe061fd17a0d2333eaa.png)
您最近一年使用:0次
2017-04-03更新
|
595次组卷
|
2卷引用:【全国百强校】广西桂林市第十八中学2017-2018学年高一下学期期中考试数学试题
名校
解题方法
4 . 如图,已知平面
平面
,四边形
是正方形,四边形
是菱形,且
,点
分别为边
的中点,点
是线段
上的动点.
![](https://img.xkw.com/dksih/QBM/2017/3/7/1638704566247424/1656268033253376/STEM/cef19feb86ea43e99d354edbbc3b725c.png?resizew=236)
(1)求证:
平面
;
(2)求三棱锥
的体积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c674dc5024374f53920947c4cf4baf11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f611d0a0894890a13e08135c1b887d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c0f067a2a348ceb24a408f82992eab8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bc67cc4eb17a62a39d9105ca763a6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/2017/3/7/1638704566247424/1656268033253376/STEM/cef19feb86ea43e99d354edbbc3b725c.png?resizew=236)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d07d16fc91aa960b67ba4b474de8a62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc46688d8723cf2003fc25890265200.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/350b7afa86146fb39d1fcd456c862b49.png)
您最近一年使用:0次
2017-04-01更新
|
878次组卷
|
3卷引用:2017届广西陆川县中学高三下学期知识竞赛文数试卷
解题方法
5 . 如图,ABCD是平行四边形,已知
,平面
平面ABCD.
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572934302015488/1572934308421632/STEM/6eb4b05871b84419a1fd7e0c850a40d1.png?resizew=144)
证明:
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59c23e433c39c6629e89107b5cc983f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39282bdf319f30d7bc261e2e3ab3b1e4.png)
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572934302015488/1572934308421632/STEM/6eb4b05871b84419a1fd7e0c850a40d1.png?resizew=144)
证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/509d8dd6031dc0ef92075877e53fe201.png)
您最近一年使用:0次
解题方法
6 . 在平行四边形ABCD中,
,
,
,若将其沿BD折成直二面角A-BD-C,则三棱锥A-BDC的外接球的表面积为 ( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8915e8e775538d41debf1933102c6b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d6bdfb0e1be5583e794ab614a8abe1b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
7 . 如图所示,在三棱锥ABCD中,CD⊥BD,AB=AD,E为BC的中点.
(1)求证:AE⊥BD;
(2)设平面ABD⊥平面BCD,AD=CD=2,BC=4,求三棱锥DABC的体积.
(1)求证:AE⊥BD;
(2)设平面ABD⊥平面BCD,AD=CD=2,BC=4,求三棱锥DABC的体积.
![](https://img.xkw.com/dksih/QBM/2019/4/26/2190909994115072/2192122708025344/STEM/6840363c46eb4b8ab25d995988d30ac9.png?resizew=181)
您最近一年使用:0次
2016-12-04更新
|
1379次组卷
|
4卷引用:【全国市级联考】广西钦州市2018届高三第三次质量检测试卷文科数学
【全国市级联考】广西钦州市2018届高三第三次质量检测试卷文科数学2016届云南省高三下学期第一次高中毕业生复习统一测试文科数学试卷【校级联考】福建省平和一中、南靖一中等五校2018-2019学年高一年下学期期中联考数学试题(已下线)2021年全国新高考Ⅰ卷数学试题变式题18-22题
8 . 如图,在四棱锥
中,底面
是边长为
的正方形,
分别为
的中点,侧面
底面
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/18/a59496fe-af17-4365-a9e8-8704410f3fbe.png?resizew=183)
(1)求证:
∥平面
,
(2)求证:直线
平面
,
(3)求证:平面
平面
.
![](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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0ae9e915d670edaa52d9ad9f3f071a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb5363352988977cd5c38286b17a1097.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/18/a59496fe-af17-4365-a9e8-8704410f3fbe.png?resizew=183)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(3)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
9 . 如图,在三棱锥
中,
是等边三角形,∠PAC=∠PBC=90º.
(1)证明:AB⊥PC;
(2)若
,且平面
⊥平面
,求三棱锥
体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
(1)证明:AB⊥PC;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eea78bf026d76f1cb9cc3dc9349a193.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
您最近一年使用:0次
2016-11-30更新
|
1939次组卷
|
5卷引用:2009年普通高等学校招生全国统一考试文科数学(宁夏卷)
真题
10 . 四棱锥S—ABCD中,底面ABCD为平行四边形,侧面SBC⊥底面ABCD,已知
∠ABC = 45°,AB=2,BC=
,SA=SB =![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(1)证明SA⊥BC;
(2)求直线SD与平面SAB所成角的大小.
∠ABC = 45°,AB=2,BC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(1)证明SA⊥BC;
(2)求直线SD与平面SAB所成角的大小.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/30/7a2a847a-2350-4732-a70c-b146a0a8a808.png?resizew=167)
您最近一年使用:0次
2016-11-30更新
|
1861次组卷
|
5卷引用:2011届广西桂林中学高三高考模拟考试文数