1 . 如图,正方体
中,
分别为
的中点.
(1)求证:平面
⊥平面
;
(2)当点
在
上运动时,是否都有
平面
,证明你的结论;
(3)若
是
的中点,试判断
与平面
是否垂直?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e06947327f4c41340b8713e8a6b4c87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b4cd2b33bd983a9ed6575b9de04a46a.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e3334853138fb74687d66b1e45f2fd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99f488b85184d4e9d5fc9ccd0cfda8c5.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e3334853138fb74687d66b1e45f2fd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e06947327f4c41340b8713e8a6b4c87.png)
![](https://img.xkw.com/dksih/QBM/2017/8/21/1756902440853504/1757537232633856/STEM/b379cb46221c45b4ba73b4d1ca7c8ab5.png?resizew=220)
您最近一年使用:0次
2 . 如图
,等腰梯形
中,
,
于点
,
,且
.沿
把
折起到
的位置(如图
),使
.
(I)求证:
平面
.
(II)求三棱锥
的体积.
(III)线段
上是否存在点
,使得
平面
,若存在,指出点
的位置并证明;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2018/1/6/1854387069976576/1855320408842240/STEM/748fb2bb3cea4a86be70a795ffd28a77.png?resizew=211)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a59a7d30b877db63279f0b44184da40c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd44a2544888b6bef38bb9d51230c9e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a45024b1f1c50249cc194e8689ec01cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/151020b65382d4d26b06453ca77d9442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829018a6ca0aff95d89e3f7cd943274e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ef328d61bcf3cece520c35a2ce449ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2de47e6e8128d7aeb2f1877920dc9ff.png)
(I)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b4cc38f853822c6949c9b959b01cdac.png)
(II)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efb7eb9cc38b22a3ac9442e84d47b769.png)
(III)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ca15691dfea154b932004966f2fbca3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2061b9ab3862d9c36d32c4ffef91145a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44043884c1c5f80bfb013d9ddb48e277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/2018/1/6/1854387069976576/1855320408842240/STEM/748fb2bb3cea4a86be70a795ffd28a77.png?resizew=211)
![](https://img.xkw.com/dksih/QBM/2018/1/6/1854387069976576/1855320408842240/STEM/9ff2cc0fb185433d910d7c3c32828482.png?resizew=196)
您最近一年使用:0次
名校
解题方法
3 . 如图所示,在四棱锥P-ABCD中,PD⊥底面ABCD,底面ABCD为正方形,PD=DC,F是PB的中点.求证:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/4/bff2e65f-32f4-4225-9512-21bb78a3caec.png?resizew=176)
(1)DF⊥AP.
(2)在线段AD上是否存在点G,使GF⊥平面PBC?若存在,说明G点的位置,并证明你的结论;若不存在,说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/4/bff2e65f-32f4-4225-9512-21bb78a3caec.png?resizew=176)
(1)DF⊥AP.
(2)在线段AD上是否存在点G,使GF⊥平面PBC?若存在,说明G点的位置,并证明你的结论;若不存在,说明理由.
您最近一年使用:0次
名校
解题方法
4 . 如图,在菱形
中,
⊥平面
,且四边形
是平行四边形.
![](https://img.xkw.com/dksih/QBM/2017/10/11/1793058665390080/1795120232783872/STEM/af55a97e45d5478abe96891c2a29a524.png?resizew=212)
(1)求证:
;
(2)当点
在
的什么位置时,使得
∥平面
,并加以证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3ab4fdfc612c9fa2dd8ae24904192d8.png)
![](https://img.xkw.com/dksih/QBM/2017/10/11/1793058665390080/1795120232783872/STEM/af55a97e45d5478abe96891c2a29a524.png?resizew=212)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adf21399dcf3682bf5d3f9cbd5eed86c.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/711da913d92fc989e581bcfdfe092a18.png)
您最近一年使用:0次
2017-10-14更新
|
686次组卷
|
3卷引用:浙江省嘉兴市第一中学2017-2018学年高二10月月考数学试题
5 . 如图,
是平行四边形,
平面
,
//
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2017/10/13/1794282516774912/1794471202021376/STEM/9f2bf70c6a4e4510a99b1859f87f1aab.png?resizew=252)
(1)证明:
//平面
;
(2)求证:平面
平面
;
(3)求直线
与平面
所成角的正弦值;
(4)求二面角
的平面角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f95475bfc06e884754eb4a455c3f434e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9b5d2943803894bc5d204e75e2d172b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f04edd173055da613832b187737ce4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d31430a87a688a727b86e4001dcb3e6.png)
![](https://img.xkw.com/dksih/QBM/2017/10/13/1794282516774912/1794471202021376/STEM/9f2bf70c6a4e4510a99b1859f87f1aab.png?resizew=252)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8257b6bd25104e07b9ad935c0a3aac4.png)
(3)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdd5861601a5e5aaa35dc70b902fd381.png)
(4)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69076a8440ebd8d01106579c7b5bce62.png)
您最近一年使用:0次
名校
解题方法
6 . 如图,在四棱锥
中,平面
平面
,且
,
.四边形
满足
,
,
.
为侧棱
的中点,
为侧棱
上的任意一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/4/130e0486-ae15-407b-a9a2-6c0815c33e36.png?resizew=334)
(1)若
为
的中点,求证:平面
平面
;
(2)是否存在点
,使得直线
与平面
垂直?若存在,写出证明过程并求出线段
的长;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0d9ef979b9f27a28cbda6923e888ccc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b10835116b9b777a666b438c907b49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae1e04eeb4de72e5750dae77bcb6f88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829018a6ca0aff95d89e3f7cd943274e.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/4/130e0486-ae15-407b-a9a2-6c0815c33e36.png?resizew=334)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b0f9834bab3153ffb5d7838c274a5d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)是否存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
您最近一年使用:0次
2017-11-28更新
|
730次组卷
|
3卷引用:四川省成都市双流中学2018届高三11月月考数学(文)试题
7 . 如图,四棱锥
的底面是正方形,侧棱
⊥底面
是
的中点.
(Ⅰ)求证:
∥
;
(Ⅱ)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8f449e8cd3075c1de5cae3a57293f38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f6d94889ef44776a1a60586922ee891.png)
(Ⅱ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/509d8dd6031dc0ef92075877e53fe201.png)
![](https://img.xkw.com/dksih/QBM/2017/11/15/1817625011290112/1819374978760704/STEM/dc9e51a78fac47e59bc20c1aae79dcbe.png?resizew=166)
您最近一年使用:0次
2017-11-17更新
|
936次组卷
|
5卷引用:广东省佛山市第一中学2017-2018学年高二上学期期中考试数学(文)试题
8 . 如图所示,在三棱锥P-ABC中,E、F分别为AC、BC的中点.
![](https://img.xkw.com/dksih/QBM/2017/11/3/1809308307906560/1810654741446656/STEM/4dac8af952944543b40641c0c425a62e.png?resizew=282)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7dbf1bd1f7f257cab0bcbfbe750c99.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63e4d19bf237a6fca67e0d01a9ddb726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d89ba4036a5d18ec4abed44d7fd8e89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bafa8c14100a4f847b41b9148954116c.png)
您最近一年使用:0次
解题方法
9 . 如图,四棱锥
的底面是边长为
的正方形,侧棱
底面
,且
,
是侧棱
上的动点.
![](https://img.xkw.com/dksih/QBM/2017/10/21/1806565718491136/1807228388163584/STEM/c114c5abd9a243c2834a2cc99f0f6970.png?resizew=176)
(1)如果
是
的中点,求证
平面
.
(2)是否不论点
在侧棱
的任何位置,都有
?证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.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/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://img.xkw.com/dksih/QBM/2017/10/21/1806565718491136/1807228388163584/STEM/c114c5abd9a243c2834a2cc99f0f6970.png?resizew=176)
(1)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e93a5ea2c4dab70518bed4b3f2989f47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)是否不论点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/509d8dd6031dc0ef92075877e53fe201.png)
您最近一年使用:0次
2017-10-31更新
|
301次组卷
|
2卷引用:北京海淀中关村中学2016-2017高二上学期期中数学(理)试题
10 . 如图,在梯形
中,
,
,
,
平面
,
.
![](https://img.xkw.com/dksih/QBM/2017/10/28/1805179522236416/1805988278362112/STEM/172bcf233ce6477d8b3cd833d4a8f618.png?resizew=218)
(1)证明:
平面
;
(2)若
为
的中点,求证:
平面
.
![](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/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829018a6ca0aff95d89e3f7cd943274e.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/9d50a68fed1c23837d1267bdda5c1962.png)
![](https://img.xkw.com/dksih/QBM/2017/10/28/1805179522236416/1805988278362112/STEM/172bcf233ce6477d8b3cd833d4a8f618.png?resizew=218)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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2017-10-29更新
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2卷引用:山西省太原市师范学院附属中学2017-2018学年高二上学期第一次月考数学(理)试题