名校
1 . 如图,已知
AB'C是边长为2的等边三角形,D是AB'的中点,DH⊥B′C,如图,将
B'DH沿边DH翻折至
BDH.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/30/ee0ee863-117a-4da1-804f-1dee89529c5c.png?resizew=283)
(1)在线段BC上是否存在点F,使得AF∥平面BDH?若存在,求
的值;若不存在,请说明理由;
(2)若平面BHC与平面BDA所成的二面角的余弦值为
,求三棱锥B-DCH的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/30/ee0ee863-117a-4da1-804f-1dee89529c5c.png?resizew=283)
(1)在线段BC上是否存在点F,使得AF∥平面BDH?若存在,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e0f405180e34fc36d15d86bb9af4182.png)
(2)若平面BHC与平面BDA所成的二面角的余弦值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
您最近一年使用:0次
2023-04-29更新
|
1028次组卷
|
7卷引用:江西省景德镇一中2022-2023学年高二(19班)下学期期中考试数学试题
江西省景德镇一中2022-2023学年高二(19班)下学期期中考试数学试题广东省深圳市第二高级中学2023-2024学年高二上学期第一学段考试数学试题湖南省新高考教学教研联盟2023届高三下学期3月第一次联考数学试题陕西省西安中学2023届高三七模理科数学试题(已下线)模拟检测卷03(理科)河南省信阳市浉河区信阳高级中学2024届高三上学期第八次大考数学试题(已下线)第三章 折叠、旋转与展开 专题一 平面图形的翻折、旋转 微点3 翻折、旋转中的基本问题(三)
名校
2 . 如图,在多面体
中,侧面
为菱形,侧面
为直角梯形,
分别为
的中点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/2/480c125d-07de-431c-a71b-413c35489d72.png?resizew=166)
(1)证明:
平面
;
(2)若平面
平面
,多面体
的体积为
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cf2fa3cb87267ee5f968c2a9362d216.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9d54cbbf601f4583659771eb534997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0332df44007ede3a48a4cb3c45dfa0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eedee49f410d11fe03eb5389422d022.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92fbe0488899724e45ceb006d055b87d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/2/480c125d-07de-431c-a71b-413c35489d72.png?resizew=166)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9d54cbbf601f4583659771eb534997.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d0f23a9fcac0e87e4175cd6131b15ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9d54cbbf601f4583659771eb534997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/149bc19ed62219813a1738616f65c2fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20af148464904e21f4374cc8fb886fba.png)
您最近一年使用:0次
2023-04-28更新
|
1691次组卷
|
5卷引用:江西省吉安市峡江中学2023-2024学年高二上学期期末数学试卷(九省联考题型)
江西省吉安市峡江中学2023-2024学年高二上学期期末数学试卷(九省联考题型)江西省赣抚吉十一校联盟体2023届高三下学期4月联考数学(理)试题江苏省扬州中学2022-2023学年高二下学期5月月考数学试题(已下线)专题03 空间向量求角度与距离10种题型归类-【巅峰课堂】2023-2024学年高二数学上学期期中期末复习讲练测(人教A版2019选择性必修第一册)河南省新乡市第一中学2023届高三三轮冲刺第十测理科数学试题
名校
解题方法
3 . 如图,四棱锥
中,底面ABCD为菱形,
平面ABCD,E为PD中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/24/ce929df0-8cbf-4fe2-befd-570d5e5c33db.png?resizew=192)
(1)平面
平面
.
(2)设
,
,三棱锥
的体积为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/24/ce929df0-8cbf-4fe2-befd-570d5e5c33db.png?resizew=192)
(1)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/747ead538147b13b484c3ba92d65cc31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27d39f37441ee55dbc8f1a6ca199a66b.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc532cfe64300cb3da9e04a307c957a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05740f0c6071846227dc0ec177ad15e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b565e518d475a50358fedff2f0bb8dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69a8b76e36783a69d14ec54af82c7df0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a03a08e6ea74ee085ed9dd4a05af94c2.png)
您最近一年使用:0次
21-22高一下·福建·期中
4 . 如图,一个圆锥挖掉一个内接正三棱柱
(棱柱各顶点均在圆锥侧面或底面上),若棱柱侧面
落在圆锥底面上.已知正三棱柱底面边长为
,高为2.
的体积;
(2)求该几何体的表面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
(2)求该几何体的表面积.
您最近一年使用:0次
2023-09-01更新
|
558次组卷
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5卷引用:江西省乐安县第二中学2023-2024学年高二上学期入学检测数学试题
江西省乐安县第二中学2023-2024学年高二上学期入学检测数学试题(已下线)福建省泉州第一中学2021-2022学年高一下学期期中考试数学试题河南省郑州市六校联盟2022-2023学年高一下学期期中数学试题云南省大理白族自治州民族中学2022-2023学年高一下学期期中数学试题(已下线)8.3.2 圆柱、圆锥、圆台、球的表面积和体积-同步精品课堂(人教A版2019必修第二册)
名校
解题方法
5 . 如图,在三棱锥
中,平面
平面
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/4/c4e199b8-4505-482a-8bc0-34ea79d54c57.png?resizew=189)
(1)证明:
;
(2)已知
是边长为1的等边三角形,已知点
在棱
的中点,且二面角
的大小为
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b7dd39f58ea8f61368919f785c07805.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/4/c4e199b8-4505-482a-8bc0-34ea79d54c57.png?resizew=189)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21be01a95cdd3149512bf95d6084fdd6.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4807ca16360c0cca436e59d4be98f626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/324d453870b345da0c41977290192f94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
您最近一年使用:0次
2023-04-03更新
|
405次组卷
|
3卷引用:江西省上饶市六校2022-2023学年高二下学期5月联考数学试题
6 . 如图,PA⊥平面ABCD,四边形ABCD是矩形,
,
,点F为PB中点,点E在边BC上移动.
![](https://img.xkw.com/dksih/QBM/2023/3/25/3201976161361920/3203123516465152/STEM/2993a83a6632411b86f142fd113a7f54.png?resizew=143)
(1)求证:
平面AFC;
(2)若二面角
的大小为60°,则CE为何值时,三棱锥
的体积为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d783fe7f3ce673d5d21281174e7a7968.png)
![](https://img.xkw.com/dksih/QBM/2023/3/25/3201976161361920/3203123516465152/STEM/2993a83a6632411b86f142fd113a7f54.png?resizew=143)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36222db36e348661eb5f616820e4e60f.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b796bbaeb8450404c2d146283562006e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/437c9774700f6c066b3e19d17d54b368.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e6486784415f3537c9a13556c05d893.png)
您最近一年使用:0次
名校
解题方法
7 . 如图所示,在长方形
中,
,
为
的中点,以
为折痕,把
折起到
的位置,且平面
平面
.
;
(2)求四棱锥
的体积;
(3)在棱
上是否存在一点P,使得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac8b40d14544a9be0bebdb276f0fa865.png)
平面
,若存在,求出点P的位置;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c79e56bc6f1db8f446fc5bd34a08865.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63b43490ca09467a4c8cd8cfe91c94e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84f9c64303370347131dd9d8c5c70c01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70fd4f68511d2393905617bfdeddddec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c75d1b97dc32e2b99bccd4d8a02ef17.png)
(2)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f7d528d7d5aea71bb3d9df16055c2a7.png)
(3)在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d226aef207ce71a381d6f63801cc9d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac8b40d14544a9be0bebdb276f0fa865.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d67be899bc131ec1b9921ae9787c40d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
您最近一年使用:0次
2024-05-12更新
|
1822次组卷
|
10卷引用:江西省抚州市金溪县第一中学2020-2021学年高二上学期入学考试数学(理)试题
江西省抚州市金溪县第一中学2020-2021学年高二上学期入学考试数学(理)试题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(理)试题(已下线)【新东方】杭州新东方高中数学试卷324湖南省邵阳市邵东市第三中学2020-2021学年高一下学期第三次月考数学试题广东省东莞市东莞实验中学2022-2023学年高一下学期5月月考数学试题广东省东莞市东莞高级中学2022-2023学年高一下学期期中数学试题重庆市永川北山中学校2022-2023学年高一下学期期中数学试题(已下线)第八章 本章综合--考点强化训练【第一练】“上好三节课,做好三套题“高中数学素养晋级之路(已下线)专题06 立体几何初步解答题热点题型-《期末真题分类汇编》(江苏专用)(已下线)专题04 第八章 立体几何初步(2)-期末考点大串讲(人教A版2019必修第二册)
名校
解题方法
8 . 如图(1)是将一副直角三角尺拼成的平面图形,已知
,
,
,现将
沿着
折起使之与
构成二面角,如图(2).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/c871868f-eaec-4055-9c25-762d42faef5f.png?resizew=290)
(1)当三棱锥
体积最大时,求三棱锥
的体积;
(2)在(1)的情况下,求
与
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/022365ed188bd800e0b8a2b4ec1e2303.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b27e47690ed332c573186992b6d25654.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d4d00b86b2f067b902baf6e52f0faab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/c871868f-eaec-4055-9c25-762d42faef5f.png?resizew=290)
(1)当三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
(2)在(1)的情况下,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
您最近一年使用:0次
2023-02-22更新
|
156次组卷
|
3卷引用:江西省九校2022-2023学年高二下学期开学联考数学试题
江西省九校2022-2023学年高二下学期开学联考数学试题江西省泰和中学2022-2023学年高二上学期期末考试数学试题(已下线)通关练04 空间向量与立体几何大题9考点精练(41题)- 【考点通关】2023-2024学年高二数学高频考点与解题策略(人教A版2019选择性必修第一册)
9 . 如图,在等腰直角
中,
,DB和EC都垂直于平面ABC,且
,F为线段AE上一点,设
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/066def8b-26e3-4e69-ac55-7c7f682e11cf.png?resizew=132)
(1)当
时,求证:
平面ABC;
(2)当二面角
的余弦值为
时,求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43871d8531150e25bd32a4e907ebc920.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/156fd26fd522989b6915a5e9a4256989.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/066def8b-26e3-4e69-ac55-7c7f682e11cf.png?resizew=132)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1c3ea872a20fdc1843cb5ffce8a554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f687c40c3b65923237e3a96ea593e65a.png)
(2)当二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc861b80bbd26a786c680aa75871d3cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/743c08870d66a766fa25298adf4dbf89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bfb63b3c8acac52602669807b91c111.png)
您最近一年使用:0次
名校
解题方法
10 . 如图,在四棱锥
中,底面
边长为
是菱形,
,
是对角线
和
的交点,
,
为锐角,
,点
为线段
上一动点,且始终有
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/1/65f3a50e-4728-4b22-aa47-492bf8d3558f.png?resizew=203)
(1)求三棱锥
的体积;
(2)若二面角
为
,求此时直线
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/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4f5eec0addba78f2e0cdfb7ecc59a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a109c829d652632a88ade6924fcda206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b48771358b76e240743bb49c497ef7fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4221d48afd7f10a7e0538872fcd7b354.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52ab924e3692515bd8be4c36472a959a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/1/65f3a50e-4728-4b22-aa47-492bf8d3558f.png?resizew=203)
(1)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81ae4837875969d3a158cd9200e44c1.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b43f7f100bbb6267094f843764ec329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f35614aff055b98b76ca262f64e629d.png)
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2023-01-31更新
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2卷引用:江西省丰城中学2023-2024学年高二(创新班)上学期第一次10月段考数学试题