1 . 如图,在三棱锥
中,底面
是等腰直角三角形,
,
,且
,
为
的中点.
平面
;
(2)若二面角
的大小为
,求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc223bc59d4c5b1c99f811e4bded9783.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ea52361458ce2e49ed0fe99d8e6c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a77e3c1c236141d6118429fade0a9b9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc83f34b5a3c1dc09d990ce4bdc8e078.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca6d1c5eace748465b2dad5065f5111c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
名校
2 . 如图,在三棱锥
中,
为等腰直角三角形,
,
,平面
平面
.
![](https://img.xkw.com/dksih/QBM/2022/5/9/2975464327127040/2975737128345600/STEM/88f8f5b8-9599-4d01-b103-cb0388bb13c7.png?resizew=193)
(1)求证:
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db8af6c5712de3e32b3b2102cfd87800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9641d01140939c44450bf39773272af6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/2022/5/9/2975464327127040/2975737128345600/STEM/88f8f5b8-9599-4d01-b103-cb0388bb13c7.png?resizew=193)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a15a004f7d47ed595f063e60075223a.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
您最近一年使用:0次
2022-05-09更新
|
561次组卷
|
3卷引用:山西省晋中市2022届高三下学期5月模拟数学(文)试题
名校
解题方法
3 . 如图所示,在四棱锥
中,底面
为直角梯形,平面
平面
,
,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2022/3/7/2931316583587840/2932502327058432/STEM/5b6d3ec2-76e6-4d7c-af7e-b090164fea99.png?resizew=180)
(1)求证:
,并且求三棱锥
的体积;
(2)求直线
与平面
所成角的正弦值.
![](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/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b0e30c61f4433ca0d6b7c30d82632a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/678069acbf21579b42a786385b154c8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7e628d8d153b597967cbcb6e02250b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/2022/3/7/2931316583587840/2932502327058432/STEM/5b6d3ec2-76e6-4d7c-af7e-b090164fea99.png?resizew=180)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d84733f9dc908ceb11459cc2aed580ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddfe0ccf24d760c77535a70c92dad145.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
您最近一年使用:0次
2022-03-09更新
|
296次组卷
|
2卷引用:山西省晋中市2022届高三二模数学(理)试题
解题方法
4 . 如图所示,在四棱锥P-ABCD中,PA⊥平面ABCD,底面ABCD是矩形,
,
,过点B作BE⊥AC,交AD于点E,点F,G分别为线段PD,DC的中点.
![](https://img.xkw.com/dksih/QBM/2022/3/8/2931669833605120/2932329304940544/STEM/a4b4e379991842a39b6b6325331ca4f6.png?resizew=152)
(1)证明:AC⊥平面BEF;
(2)求三棱锥F-BGE的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f235e99b0b55ac252c4b18cc315dc114.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://img.xkw.com/dksih/QBM/2022/3/8/2931669833605120/2932329304940544/STEM/a4b4e379991842a39b6b6325331ca4f6.png?resizew=152)
(1)证明:AC⊥平面BEF;
(2)求三棱锥F-BGE的体积.
您最近一年使用:0次
解题方法
5 . 如图所示,点P在圆柱的上底面圆周上,四边形ABCD为圆柱的下底面的内接四边形,且AC为圆柱下底面的直径,PD为圆柱的母线,且
,圆柱的底面半径为1.
![](https://img.xkw.com/dksih/QBM/2022/1/18/2897255238598656/2901521963900928/STEM/6950ed55-9d36-47cf-ad98-f6e8dbb63740.png?resizew=141)
(1)证明:
;
(2)
,B为
的中点,点Q在线段PB上,记
,求多面体PQACD的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e0f73b3c63084d9c032802e01f9a168.png)
![](https://img.xkw.com/dksih/QBM/2022/1/18/2897255238598656/2901521963900928/STEM/6950ed55-9d36-47cf-ad98-f6e8dbb63740.png?resizew=141)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf6c62979a7aa534a191d8387a741e8.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a88c44f558705de3bcefcfc0ece96b8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667349d99185bb045030b733352ff7fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac42517cf387345689e1457f62a80ec1.png)
您最近一年使用:0次
名校
6 . 在正四棱锥
中,已知
,
为底面
的中心,以点
为球心作一个半径为
的球,则平面
截该球的截面面积为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83a04565a8ebaa111894b724b0ba266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/18483c9c195ecd922772527fa85c0fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2021-05-11更新
|
717次组卷
|
4卷引用:山西省晋中市2021届高三三模数学(文)试题
名校
解题方法
7 . 现有两个全等的等腰直角三角板,直角边长为2,将它们的一直角边重合,若将其中一个三角板沿直角边折起形成三棱锥
,如图所示,其中
,点E,F,G分别是
的中点.
![](https://img.xkw.com/dksih/QBM/2021/3/8/2673623068590080/2675038879571968/STEM/7d847ed2-8fa4-4a0c-9684-508339ca4d2f.png)
(1)求证:
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c03366e8ad89bbf52a24243e94646fc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6495d0fa1d3bbb80c93317444cfa85f9.png)
![](https://img.xkw.com/dksih/QBM/2021/3/8/2673623068590080/2675038879571968/STEM/7d847ed2-8fa4-4a0c-9684-508339ca4d2f.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af841bc357e88fac4834ea8b6b3e9207.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/050c36149af140d4a55e300e68bb7138.png)
您最近一年使用:0次
2021-03-10更新
|
835次组卷
|
7卷引用:山西省晋中市2021届高三下学期二模数学(文)试题
山西省晋中市2021届高三下学期二模数学(文)试题宁夏银川六盘山高级中学2021届高三二模数学(文)试题(已下线)精做04 立体几何-备战2021年高考数学(文)大题精做(已下线)专题36 仿真模拟卷05-2021年高考数学(文)二轮复习热点题型精选精练(已下线)解密13 空间几何体(分层训练)-【高频考点解密】2021年高考数学(文)二轮复习讲义+分层训练山西省运城市景胜中学2022届高三上学期1月月考数学(文)试题陕西省榆林市神木中学2020-2021学年高二下学期第二次月考文科数学试题
名校
解题方法
8 . 现有两个全等的等腰直角三角板,直角边长为2,将它们的一直角边重合,若将其中一个三角板沿直角边折起形成三棱锥
,如图所示,其中
,点E,F,G分别是
的中点.
![](https://img.xkw.com/dksih/QBM/2021/3/8/2673593772195840/2675030665519104/STEM/a94e8390-3cca-45d6-a435-52e3d6050ac0.png)
(1)求证:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c03366e8ad89bbf52a24243e94646fc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6495d0fa1d3bbb80c93317444cfa85f9.png)
![](https://img.xkw.com/dksih/QBM/2021/3/8/2673593772195840/2675030665519104/STEM/a94e8390-3cca-45d6-a435-52e3d6050ac0.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af841bc357e88fac4834ea8b6b3e9207.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/242657c0f6a356f2cbdfc23cfff7d3e4.png)
您最近一年使用:0次
2021-03-10更新
|
449次组卷
|
5卷引用:山西省晋中市2021届高三下学期二模数学(理)试题
名校
9 . 如图,平面四边形
中,
,
,
,
为等边三角形,现将
沿
翻折,使点
移动至点
,且
,则三棱锥
的外接球的表面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/9dfeafae-f84a-4da8-98f8-aa2e88ca387c.png?resizew=183)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae33911e41aa2f7004cc01e336f96bf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b40d0d2f3cdd8981bb792ad87efb42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ffc2817fa590affb5a760a25dc65308.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0063f3f48e49f2970ec7f097567cef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/9dfeafae-f84a-4da8-98f8-aa2e88ca387c.png?resizew=183)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2020-06-24更新
|
595次组卷
|
8卷引用:2020届山西省晋中市高三普通高等学校招生统一模拟(四模)数学(理)试题
解题方法
10 . 已知三棱锥
中,
为等腰直角三角形,
,
平面
,且
,
且
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/3c4884fc-7497-446b-889d-3adba055b84f.png?resizew=166)
(1)求证:直线
平面
;
(2)求多面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/178a27068cf5517ad64f211af10256ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45fbffb9e2c7fa7c5006cde8da0cabe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fa5283f77126a91f4e2613abefccad8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45e8760fb60b1d9e360cd543ccfd0535.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26121d381c6fbe6d2cfa71feca5b8bd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/3c4884fc-7497-446b-889d-3adba055b84f.png?resizew=166)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063510e3c1fb6a7ccc3b8e3e3c7d660e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求多面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4781af69ba831fa392b54aef6cd5caf9.png)
您最近一年使用:0次