1 . 如图,四面体ABCD中,点E,F分别为线段AC,AD的中点,平面
平面
,
,
,垂足为H.
![](https://img.xkw.com/dksih/QBM/2020/11/18/2595204682768384/2601979299405824/STEM/a02fff92-5ea3-4f41-8c97-80ec262792ac.png)
(1)求证:
;
(2)求证:平面
平面ABC.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7898ccc0ec40a1460fae5b5bf6bc001.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddb409de7d8056cdef2cd68080fe47ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7903326ef7b584fb53651194b7541fc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41a7cf70f8772d8fea4599b18df2c88f.png)
![](https://img.xkw.com/dksih/QBM/2020/11/18/2595204682768384/2601979299405824/STEM/a02fff92-5ea3-4f41-8c97-80ec262792ac.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cf85bbbf81e16ba6da39bfebf0e09a7.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d443d65476dd21c8e1f9345b3f13439e.png)
您最近一年使用:0次
2020-11-27更新
|
2638次组卷
|
6卷引用:四川省蓉城名校联盟2020-2021学年高二第一学期期中联考理科数学试题
四川省蓉城名校联盟2020-2021学年高二第一学期期中联考理科数学试题四川省成都市蓉城名校联盟2020-2021学年高二(高中2019级)上学期期中联考文科数学试题(已下线)第二章+点、直线、平面之间的位置关系(能力提升)-2020-2021学年高一数学单元测试定心卷(人教版必修2)四川省内江市第六中学2020-2021学年高二上学期第三次月考数学理科试题四川省内江市第六中学2020-2021学年高二上学期第三次月考数学文科试题四川省成都市2020-2021学年高二上学期期中数学理科试题
名校
解题方法
2 . 如图,四棱锥
中,底面
为梯形,
,点
为
的中点,且
,点
在
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/a1106d2f-81a3-4c26-924d-57e872ee0947.png?resizew=207)
(1)求证:
//平面
(2)若平面
平面
,
且
,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/21c1a483fcfda1dc585bd65700ccd308.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac410282dc087b847b82ca946898d38f.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/a986e6cfd114c3c7978be62259e7c19d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/a1106d2f-81a3-4c26-924d-57e872ee0947.png?resizew=207)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若平面
![](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/62974d34de3a12418d6b700420afd1b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0453cfd7e92bf7746a88280b9e7b580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77fcf9557cfac39754ae2bc17a52cfaf.png)
您最近一年使用:0次
2020-11-12更新
|
1563次组卷
|
7卷引用:吉林省长春市汽车经济技术开发区第六中学2020-2021学年第一学期高二月考数学(文)试题
吉林省长春市汽车经济技术开发区第六中学2020-2021学年第一学期高二月考数学(文)试题(已下线)考点29 空间几何体的表面积与体积-备战2021年高考数学(理)一轮复习考点一遍过(已下线)考点28 空间几何体的表面积与体积-备战2021年高考数学(文)一轮复习考点一遍过山西省朔州市怀仁县大地学校2020-2021学年高二上学期第三次月考文科数学试题山西省朔州市怀仁县大地学校2020-2021学年高二上学期第三次月考理科数学试题宁夏石嘴山市2021届高三下学期三模数学(文)试题云南省红河州弥勒市第一中学2020-2021学年高二下学期第二次月考数学(文)试题
19-20高一·浙江杭州·期末
3 . 已知在四棱锥
中,底面
是平行四边形,
平面
,
,
,
,
,E,F,G,H分别是
,
,
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/30/6729ad28-f4c0-475a-8264-058f0e0b1db0.png?resizew=165)
(1)求证:
平面
;
(2)过点F作平面
,使
平面
,当平面
平面
时,设
与平面
交于点Q,求
的长.
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd3eb538f36e6e722e4ce125266b99b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eee296a7d9fba487f1485c61580196f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/30/6729ad28-f4c0-475a-8264-058f0e0b1db0.png?resizew=165)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc98c40183ee10c0ac2253c82f313fb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74781b72a45cd660041179838ff85fbf.png)
(2)过点F作平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec47f6d6cb1eeefbb466e4fe71fd568c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa807136194c18d3ac58902c67f9333.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b896abbe80bff63a275ef2e1550c2de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
您最近一年使用:0次
名校
解题方法
4 . 如图,在四棱锥
中,底面
是菱形,
,Q为
的中点,
平面
,
,M是棱
上一点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/dc962535-03cb-4e0d-b58c-62474d20400a.png?resizew=195)
(1)证明:
平面
;
(2)求二面角
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/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b61346bd4091070ba84a4046f87f365.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/931bbffda5e872703c9947eccc47ede2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df46cb89ec29c07e6d7b373cf845f7d7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/dc962535-03cb-4e0d-b58c-62474d20400a.png?resizew=195)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c2b786c64e6a9ed2ec5670cde74f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c233190f9339e777fe26c7b690541baf.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a372910e053a09c6257243f3057a7aa.png)
您最近一年使用:0次
解题方法
5 . 已知如图所示的正方体ABCD-A1B1C1D1中,E、F分别是AB、A1C的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/733fa864-10cf-4007-9eec-c2601b2d691e.png?resizew=158)
(1)求证:EF∥平面ADD1A1;
(2)求证:EF⊥平面A1DC.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/733fa864-10cf-4007-9eec-c2601b2d691e.png?resizew=158)
(1)求证:EF∥平面ADD1A1;
(2)求证:EF⊥平面A1DC.
您最近一年使用:0次
2020-10-24更新
|
782次组卷
|
2卷引用:山西省晋中市平遥古城高级中学2019-2020学年高一上学期期末数学试题
名校
6 . 如图,在四棱锥P-ABCD中,
平面ABCD,底面是棱长为1的菱形,
,
,M是PB的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/6/ff703af4-7384-4993-9c61-d2b7031a5ebc.png?resizew=139)
(1)求证:
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a58a622e2b1a239f2f96aa1501e9799.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/364d6c88726d8c3bb8ed297057332bac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/6/ff703af4-7384-4993-9c61-d2b7031a5ebc.png?resizew=139)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36222db36e348661eb5f616820e4e60f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68a7bf0da4f7c6f739d2e2461ad9b7.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
您最近一年使用:0次
2020-10-23更新
|
864次组卷
|
2卷引用:安徽省合肥市第十一中学2020-2021学年高二上学期第一次月考数学(文)试题
名校
7 . 如图,四棱锥
中侧面PAB为等边三角形且垂直于底面ABCD,
,
,E是PD的中点.
(1)证明:直线
平面PAB;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d78aafccd397e9c88a567abf4993d40f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7af36689a2d2a5f999b3b5859a3c9faf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/5/12ac3803-672c-4ea1-9060-6e7203aed88a.jpg?resizew=206)
(1)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/932a04304f2d4975955d4baabb2deeea.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bfb067a6b5e6278f089bdc29282a473.png)
您最近一年使用:0次
2020-10-12更新
|
281次组卷
|
3卷引用:江苏省南京市第十四中学2020-2021学年高二上学期学情调研测试数学试题
8 . 如图,四棱锥
中,底面
为平行四边形,
平面
,
,
,
,
分别在线段
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/f9c134b2-ea03-4165-a8de-3075e6a38b0d.png?resizew=216)
(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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4242e610cb70592b0f71fa618a7c236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2682f3f3f0f72c893b99073bcac83ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0ef7ab26fd65ed3c5ca64434935f7df.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/f9c134b2-ea03-4165-a8de-3075e6a38b0d.png?resizew=216)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d82e1b9949d05ef17c0cd24eb9ff9e92.png)
您最近一年使用:0次
名校
解题方法
9 . 如图所示在长方体
中,
,
,
,
,
分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/826898a2-7244-4450-83f9-bd1aab1da420.png?resizew=198)
(1)求证:
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/596d5398203e5dfda7d07ce501b6e6a4.png)
(2)求C到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84f23a20779cbf15d4300ffc69f27f14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5613c5d5fa1332cebd0a5d18d9f0ea16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e44374cc9f8e36b164e5fc99ee227dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a6af86610a29de883bbb8f69b5a6504.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c7d98f1afd9616821ac5c82ab185f6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/826898a2-7244-4450-83f9-bd1aab1da420.png?resizew=198)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/596d5398203e5dfda7d07ce501b6e6a4.png)
(2)求C到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12f2978d6d7c2b7e658e0149dabe5c14.png)
您最近一年使用:0次
2020-09-04更新
|
862次组卷
|
2卷引用:陕西省商洛市商丹高新学校2020届高三下学期考前适应性训练理科数学试题
名校
解题方法
10 . 如图,在直三棱柱
中,
,
,点
,
分别为
和
的中点,
![](https://img.xkw.com/dksih/QBM/2020/8/14/2527907448750080/2540649089556480/STEM/62142fc7-445c-4499-b9d8-337c37cfd562.png)
(1)求证:
平面
;
(2)求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1baa3d0db9ad31d33c2883a6efed1dc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/2020/8/14/2527907448750080/2540649089556480/STEM/62142fc7-445c-4499-b9d8-337c37cfd562.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e53b212640dadf751ef7f65a78a209.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21dee56b9f36ba8f76fe67b76383636b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb304d905125170bebfada27e7ed8960.png)
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2020-09-01更新
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721次组卷
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2卷引用:江苏省扬州市高邮中学2020届高三下学期5月模拟考试数学试题