名校
1 . 如图,在四棱柱
中,底面ABCD是等腰梯形,
,
,
,顶点
在底面ABCD内的射影恰为点C.
![](https://img.xkw.com/dksih/QBM/2020/3/24/2426683543445504/2426969450962944/STEM/449b5ed97f83408886aba846afb04e0a.png?resizew=198)
(1)求证:BC⊥平面ACD1;
(2)若直线DD1与底面ABCD所成的角为
,求平面
与平面ABCD所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37591109b0a0ec5ffe2133f83310eca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ad8d16722f5b9e7fd2602f14d5ffbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://img.xkw.com/dksih/QBM/2020/3/24/2426683543445504/2426969450962944/STEM/449b5ed97f83408886aba846afb04e0a.png?resizew=198)
(1)求证:BC⊥平面ACD1;
(2)若直线DD1与底面ABCD所成的角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679748eab882a6be0fefd2cc300349a4.png)
您最近一年使用:0次
2020-03-25更新
|
288次组卷
|
4卷引用:湖北省孝感市应城市第一高级中学2019-2020学年高二下学期期中数学试题
2 . 如图,已知
是正三角形,EA,CD都垂直于平面ABC,且
,
,F是BE的中点,
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/1cd2b33c-38ca-454a-aaad-06129f6e735a.png?resizew=149)
求证:(1)
平面ABC;
(2)
平面EDB.
(3)求几何体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f36701e643b5ae1718aa5ce1f311601.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e2a44d05b1d387150c4b359e021ffc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/1cd2b33c-38ca-454a-aaad-06129f6e735a.png?resizew=149)
求证:(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aef11392fadd7dbccb073e416279993b.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a22d6b860f06fe23618b0d3de6768fa.png)
(3)求几何体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f7eee5e1864159d8242a206147b0c89.png)
您最近一年使用:0次
2019-08-01更新
|
1559次组卷
|
5卷引用:湖北省孝感市2018-2019学年高一下学期期末数学试题
3 . 如图,在四棱锥
中,底面
为矩形,
平面
,
为棱
的中点,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/921df158-ee9e-49c0-b042-36ff84574f82.png?resizew=223)
(1)证明:
平面
.
(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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/8825d400f453c5c17a7beeb1cc9a9cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bec03e804f0cea1db5cde2aa185056a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d5942a81561bf6617281126e97e5595.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/921df158-ee9e-49c0-b042-36ff84574f82.png?resizew=223)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/502f49e759b623b5c3a8b901bb9882cc.png)
您最近一年使用:0次
2019-05-30更新
|
282次组卷
|
2卷引用:湖北省安陆一中2019年5月高二摸底调考数学(理)试题
4 . 如图所示,在平行四边形
中,
,
,将它沿对角线
折起,使二面角
的大小为
,则点
与点
之间的距离为_________ ;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3e9ef3e849788645552cfb0735d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3d69c69c46ac34f560546c22af120be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c909cd1b6f3fa1ec39eb245e8f5c11c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/1a676d9e-98bf-49e3-958e-5ab5e0097282.png?resizew=161)
您最近一年使用:0次
5 . 如图,在三棱锥
中,平面
平面
,
,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2018/7/5/1982156687867904/1983315942416384/STEM/af8ff0e47aa94595aefc540e62907dbe.png?resizew=208)
(1)证明:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448cbac9a1ef3de7538a6b30cdc39582.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/562550fab88f293e9988cb6033b99932.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e85251aa3ba40d2b326596ab251f08af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2018/7/5/1982156687867904/1983315942416384/STEM/af8ff0e47aa94595aefc540e62907dbe.png?resizew=208)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e33a849c6276adc188d414b048665f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cc6f6dfdbe7d39891c35f67e1a95c7f.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/822afb8100552bb2f12c7dde188ae388.png)
您最近一年使用:0次
名校
6 . 在正方体
中,点
,
分别是
,
的中点,则下列说法正确的是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
A.![]() | B.![]() ![]() ![]() |
C.![]() ![]() | D.![]() ![]() ![]() |
您最近一年使用:0次
2018-07-07更新
|
1067次组卷
|
2卷引用:【全市校级联考】湖北省孝感市重点高中协作体2017-2018学年高二下学期期末联考数学(理)试题
7 . 如图,四面体
中,△
是边长为
的等边三角形,平面
平面
,
,点
、
分别是
、
的中点.
![](https://img.xkw.com/dksih/QBM/2018/5/11/1943126479527936/1950609721286656/STEM/30ffd00ee4d640ce8b6008841c06ece0.png?resizew=143)
(1)求证:
平面
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.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/a65d5853c26657db448af610ac72cca4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2018/5/11/1943126479527936/1950609721286656/STEM/30ffd00ee4d640ce8b6008841c06ece0.png?resizew=143)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce03b310edce42191f9fa75a1c909ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
您最近一年使用:0次
8 . 如图,在四棱锥
中,底面
为平行四边形,
,
,且
底面
.
(1)证明:
平面
;
(2)若
为
的中点,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/f80f51c31583fea58fde645474d60b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c3f15f3725dc69af03fb68c639796c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2e40a351eff6e90e3008328eca0cc8f.png)
![](https://img.xkw.com/dksih/QBM/2018/12/20/2100947456917504/2101738830356480/STEM/ef4ab1ac2f6e47fbb843c96642db3601.png?resizew=366)
您最近一年使用:0次
2018-04-14更新
|
8098次组卷
|
9卷引用:【全国校级联考】湖北省孝感市重点高中协作体2017-2018学年高二下学期期末联考数学(文)试题
【全国校级联考】湖北省孝感市重点高中协作体2017-2018学年高二下学期期末联考数学(文)试题海南省2018届高三第二次联合考试数学(文)试题安徽省六安市舒城中学2018届高三仿真(三)数学(文)试题【全国百强校】广东省汕头市金山中学2019届高三上学期期中考试数学(文)试题安徽省濉溪二中2018-2019学年高二下学期4月联考数学(文)试题江西省南昌市第二中学2019-2020学年高三第四次月考数学(文)试题贵州省思南中学2019-2020学年高二上学期期末考试数学(文)试题吉林省通化县综合高级中学2020-2021学年高二上学期期末考试数学(理)试题吉林省通化县综合高级中学2020-2021学年高二上学期期末考试数学(文)试题
名校
9 . 如图 1,在直角梯形
中,
,且
.现以
为一边向外作正方形
,然后沿边
将正方形
翻折,使
平面与平面
垂直,
为
的中点,如图 2.
![](https://img.xkw.com/dksih/QBM/2018/1/19/1863926160793600/1865193617375232/STEM/ae413ed57ad34ab0b5fb8c7bb905086b.png?resizew=449)
(1)求证:
平面
;
(2)求证:
平面
;
(3)求
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/b0465d52848d924b0576172c9b22a831.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0046177466c78f08d45449dc5639bf38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://img.xkw.com/dksih/QBM/2018/1/19/1863926160793600/1865193617375232/STEM/ae413ed57ad34ab0b5fb8c7bb905086b.png?resizew=449)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac480d8d9d7821b62a603cf5cfda236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9a814b70236a108be5d6e7ff271fe92.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9a814b70236a108be5d6e7ff271fe92.png)
您最近一年使用:0次
2018-01-21更新
|
2295次组卷
|
6卷引用:湖北省孝感市部分重点学校2019-2020学年高二上学期10月联考数学试题
解题方法
10 . 已知
是两条不重合的直线,
是不重合的平面,下面四个命题中正确的是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
A.若![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() |
您最近一年使用:0次
2017-02-16更新
|
414次组卷
|
2卷引用:湖北省孝感市七校教学联盟2016-2017学年高一下学期期末考试数学(文)试题