名校
解题方法
1 . 如图①,在菱形
中,
,将
沿对角线
翻折(如图②),则在翻折的过程中,下列选项中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e77db8e97cf0910fec52f526d0e4b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bb961bd7db3adb76af2d4cedb611bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
A.存在某个位置,使得![]() |
B.存在某个位置,使得![]() |
C.存在某个位置,使得点![]() ![]() ![]() |
D.存在某个位置,使得![]() ![]() |
您最近一年使用:0次
2022-11-24更新
|
892次组卷
|
4卷引用:山西省运城市稷山县稷山中学2023届高三上学期11月月考数学试题
名校
解题方法
2 . 如图所示,在三棱锥
中,
平面
,
,过点
分别作
,
,
,
分别为垂足.
平面
;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbfbaf73297240eb116f22489519895a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f392902d611863c6908a48e696e7bd8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a4a6a1e70241d600bc6c104313eac61.png)
您最近一年使用:0次
2022-06-10更新
|
1033次组卷
|
2卷引用:山西省长治市第二中学校2021-2022学年高一下学期第二次月考数学试题
19-20高一·浙江杭州·期末
名校
解题方法
3 . 如图,矩形
中,
,E为边
的中点,将
沿直线
翻折成
.若M为线段
的中点,则在
翻折过程中,下面四个选项中正确的是______ (填写所有的正确选项)
(1)
是定值
(2)点M在某个球面上运动
(3)存在某个位置,使![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2181c78134c310f746eab44b9124e63b.png)
(4)存在某个位置,使
平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4e4a162f12d12a082b8d8fdd1aeab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa2a83fed9bf4cb09d84a980452e346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/17/49c45696-902c-4380-a480-fc6d28cf58aa.png?resizew=208)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c2f99ac2b6bc91b983628b68a5cd0d.png)
(2)点M在某个球面上运动
(3)存在某个位置,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2181c78134c310f746eab44b9124e63b.png)
(4)存在某个位置,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c70966a318ef8ecf874257f5c5e5db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/657dffbd3623b705f871878fbd9df57e.png)
您最近一年使用:0次
2020-11-30更新
|
1080次组卷
|
5卷引用:山西省怀仁市2020-2021学年高二上学期期末数学(文)试题
名校
4 . 如图,直三棱柱ABC-A1B1C1中,侧棱长为2,AC=BC=1,∠ACB=90°,D是A1B1的中点,F是BB1上的动点,AB1,DF交于点E.要使AB1⊥平面C1DF,则线段B1F的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/3c6c8dab-5927-4a2f-bb5f-3ed5e2f48135.png?resizew=115)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/3c6c8dab-5927-4a2f-bb5f-3ed5e2f48135.png?resizew=115)
A.![]() | B.1 | C.![]() | D.2 |
您最近一年使用:0次
2020-10-03更新
|
169次组卷
|
5卷引用:山西省太原市第五中学2019-2020学年高二10月阶段性检测数学(理)试题
山西省太原市第五中学2019-2020学年高二10月阶段性检测数学(理)试题山西省太原市第五中学2019-2020学年高二10月阶段性检测数学(文)试题(已下线)考点38 直线、平面垂直的判定与性质(考点专练)-备战2021年新高考数学一轮复习考点微专题(已下线)专题09 立体几何(测)-2021年高考数学二轮复习讲练测(文科)(文理通用)云南省昆明市第八中学2020-2021学年高一特色班下学期第二次月考数学试题
5 . 如图①,在正方形
的各边上分别取
四点,使
,将正方形沿对角线
折起,如图②
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/db02179b-efc5-4f52-96ac-0d18146fa1f6.png?resizew=317)
(1)证明:图②中
为矩形;
(2)当二面角
为多大时,
为正方形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42c2d86d8daea5e652d99fe1c6bc3f9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb14abc5fa04317c6b1fe32e9d4de2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/db02179b-efc5-4f52-96ac-0d18146fa1f6.png?resizew=317)
(1)证明:图②中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
(2)当二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f1854ba6cc92481d7a616bd2788a47e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
您最近一年使用:0次
名校
解题方法
6 . 如图,在四边形
中,
,以
为折痕把
折起,使点
到达点
的位置,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/c29e0c78-6351-4c42-9580-dc889bc1491c.png?resizew=141)
(1)证明:
平面
;
(2)若
为
的中点,二面角
等于60°,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aad2d7c7a8177255f745b3b8101b7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307d38cc7012c328f1f22aa793fe76d7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/c29e0c78-6351-4c42-9580-dc889bc1491c.png?resizew=141)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715cc9ea5e7d80930284ffb117142770.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f35614aff055b98b76ca262f64e629d.png)
您最近一年使用:0次
2020-05-12更新
|
1706次组卷
|
8卷引用:山西省太原市山西大学附属中学2021-2022学年高一下学期6月月考数学试题
解题方法
7 . 如图,已知边长为2的正三角形ABE所在的平面与菱形ABCD所在的平面垂直,且
,点F是BC上一点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/96d898ea-1c92-4465-9231-563d290432c6.png?resizew=160)
(1)当
时,证明:
;
(2)是否存在一个常数k,使得三棱锥
的体积等于四棱锥
的体积的
,若存在,求出k的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa3f4f259d60ade01bd9bf6632238e39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae53a0cba78189fc08b91f8bdfc07855.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/96d898ea-1c92-4465-9231-563d290432c6.png?resizew=160)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3a2a34b4317deffa40ba34e269c2b81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8aed88ad640f3d76735f1e5dbc04b23.png)
(2)是否存在一个常数k,使得三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9932c72f1ec4cc045f5335d4afc2ee0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c753cb1eb73fd8d136d00462970797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
您最近一年使用:0次
名校
8 . 如图①所示,四边形
为等腰梯形,
,且
于点
为
的中点.将
沿着
折起至
的位置,使得平面
平面
,得到如图②所示的四棱锥
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/af2fd598-ef45-4147-b869-0285bfcbd60f.png?resizew=437)
(1)求证:
;
(2)求平面
与平面
所成的锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/247e96a3a378741eb42dda3837ea5c7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3814287dbb60d478bffc5366f9928b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/353732838789714499619085201305c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33719580ce50fafc3a27eb7039be8a97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6bfad3f7e65188bcf7f62ea5acdbf4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/decee6072217173778edc84db382f97b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/af2fd598-ef45-4147-b869-0285bfcbd60f.png?resizew=437)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c723ad583a4009b7a5dd515e7e02b8a.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a7f857869bc6084d128e8c13f5c115c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6bfad3f7e65188bcf7f62ea5acdbf4a.png)
您最近一年使用:0次
9 . 如图,把边长为1的正方形
沿对角线
折成直二面角,若点
满足
,则
( )
![](https://img.xkw.com/dksih/QBM/2020/3/16/2420882788179968/2421575777681408/STEM/79e999c3501048de8bf943e6139b9859.png?resizew=158)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/164d06fc4a17f66d67b5f46370fc1773.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72fb51bcb1ae05b9dcfd1154c8510593.png)
![](https://img.xkw.com/dksih/QBM/2020/3/16/2420882788179968/2421575777681408/STEM/79e999c3501048de8bf943e6139b9859.png?resizew=158)
A.3 | B.![]() | C.4 | D.![]() |
您最近一年使用:0次
名校
10 . 如果一个四面体的三个面是直角三角形,则其第四个面不可能是( )
A.直角三角形 | B.等边三角形 | C.等腰直角三角形 | D.钝角三角形 |
您最近一年使用:0次
2020-01-31更新
|
176次组卷
|
5卷引用:山西省太原市第五中学2020-2021学年高二上学期10月月考数学(文)试题
山西省太原市第五中学2020-2021学年高二上学期10月月考数学(文)试题山西省太原市第五中学2020-2021学年高二上学期10月月考数学(理)试题2017届上海市七宝中学高三下学期综合测试五(5月)数学试题(已下线)第30练 空间点、线、面的位置关系-2021年高考数学(理)一轮复习小题必刷(已下线)课时41 空间直线与平面的位置关系-2022年高考数学一轮复习小题多维练(上海专用)