1 . 已知正方体
.
![](https://img.xkw.com/dksih/QBM/2021/5/31/2733075923009536/2805189101395968/STEM/77870f6c-0764-48a8-af99-337c77e54e75.png?resizew=251)
(1)证明:
平面
;
(2)求异面直线
与
所成的角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/2021/5/31/2733075923009536/2805189101395968/STEM/77870f6c-0764-48a8-af99-337c77e54e75.png?resizew=251)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b7bfc1d0b50681765bd3fa6d5920ed8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73845d4d663b3de0b281611fe2c762fe.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0226b9a9fd4d0647e4f759c07de9aaad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
您最近一年使用:0次
解题方法
2 . 如图,四棱锥
的底面是矩形,
平面
,
为
的中点,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/555f2821-7835-4950-9197-8ca8637cb7d0.png?resizew=158)
(1)证明:
//平面
;
(2)若
,四棱锥
的体积为
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/f52a58fbaf4fea03567e88a9f0f6e37e.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/2022/11/29/555f2821-7835-4950-9197-8ca8637cb7d0.png?resizew=158)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8716b5aad93d97ca1c3791b9c717cc0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c14ff9b66f21c05e52dc3c8908c2df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
您最近一年使用:0次
名校
解题方法
3 . 如图,在四棱锥
中,
是等边三角形,平面
平面
,底面是直角梯形,
,已知
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/ec9a67e3-2747-4ae4-9efa-0d105f814faf.png?resizew=158)
(1)若
为
的中点,求证:
平面
;
(2)求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](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/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d5ba108d7d2d4807f2c74a22e536fe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/ec9a67e3-2747-4ae4-9efa-0d105f814faf.png?resizew=158)
(1)若
![](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/c372d059202ec388960b125d4a87dc84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
您最近一年使用:0次
2021-02-27更新
|
236次组卷
|
2卷引用:云南省大理州祥云县2020-2021学年高二上学期期末统测数学(文)试题
4 . 如图,在四棱锥
中,四边形
为平行四边形,
为等边三角形,点
为
的中点,且
.
![](https://img.xkw.com/dksih/QBM/2021/4/13/2699117726965760/2786905896534016/STEM/9ba90184-ee94-43e0-8ee3-ff661dee8686.png?resizew=341)
(1)证明:平面
平面
;
(2)若
,求
到平面
的距离及四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c753cb1eb73fd8d136d00462970797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05385a6b2a32bbf6d43395bc20d9031c.png)
![](https://img.xkw.com/dksih/QBM/2021/4/13/2699117726965760/2786905896534016/STEM/9ba90184-ee94-43e0-8ee3-ff661dee8686.png?resizew=341)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed5f0cfc1049f84a04c81bd213afb8d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48a277db452e76240ec83ec6a2864bdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c753cb1eb73fd8d136d00462970797.png)
您最近一年使用:0次
2021-08-15更新
|
250次组卷
|
2卷引用:云南省巍山彝族回族自治县第一中学2020-2021学年高二下学期月考试题数学(文)试题
名校
解题方法
5 . 如图,在四棱锥
中,
,
,
,
平面
,E为PD的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/b473418a-2d80-4fb1-bb41-57257e6b4a1f.png?resizew=159)
(Ⅰ)证明:
平面
;
(Ⅱ)若
,求点E到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810227b082bd14dbcde85c3181841571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/b473418a-2d80-4fb1-bb41-57257e6b4a1f.png?resizew=159)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31c34b18525831f3eda7bb90be0199b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/672757753ee4387ac9ce54467663a82c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
2021-08-12更新
|
1074次组卷
|
7卷引用:云南省下关第一中学2020-2021学年高二上学期段考(二)数学(文)试题
2014·河北邯郸·二模
名校
解题方法
6 . 如图,矩形
中,
平面
,
,
为
上的点,且
平面
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/24/1f9db9de-d950-4979-8cca-ba93bc95c956.png?resizew=172)
(1)求证:
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55b3581f73c778ecb0931c1ab30392ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa3c61d6c19e187b4b824b6f5610cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/327832ffb5a937d88a1069395a8552af.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/24/1f9db9de-d950-4979-8cca-ba93bc95c956.png?resizew=172)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31c34b18525831f3eda7bb90be0199b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9efe66d99f813c6b1387392186822bb.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/470d3cfe1c52850807cb4cfc407e3153.png)
您最近一年使用:0次
2020-09-04更新
|
522次组卷
|
12卷引用:云南省昆明市官渡区第一中学2019-2020学年高二上学期期末考试数学(文)试题
云南省昆明市官渡区第一中学2019-2020学年高二上学期期末考试数学(文)试题(已下线)2014届河北省邯郸市高三上学期第二次模拟考试文科数学试卷2015届山东省枣庄市薛城八中4月模拟考试文科数学试卷2015届湖北省襄阳市五中高三5月模拟考试一文科数学试卷黑龙江省双鸭山市第一中学2016-2017学年高一下学期期末考试数学(理)试题黑龙江省双鸭山市第一中学2016-2017学年高一下学期期末考试数学(文)试题辽宁省大连市旅顺口区2018-2019学年高一下学期期末数学(理)试题辽宁省大连市旅顺口区2018-2019学年高一下学期期末数学(文)试题湖北省襄阳市2019-2020学年高二上学期期末数学试题四川省宜宾市第四中学2020-2021学年高二上学期开学考试数学(文)试题安徽省淮南市第二中学20202-2021学年高二(文科平行班)上学期第二次月考数学试题甘肃省白银市会宁县第四中学2021届高三上学期第四次月考数学(文)试题
解题方法
7 . 如图所示,在正方体
中,点
为线段
的中点.
![](https://img.xkw.com/dksih/QBM/2021/1/28/2645902651088896/2650251012775936/STEM/5d46f0e3-380c-4f35-af97-956365495e86.png)
(1)求证:
;
(2)求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd46c836f4108d26b7ac0b45cc872816.png)
![](https://img.xkw.com/dksih/QBM/2021/1/28/2645902651088896/2650251012775936/STEM/5d46f0e3-380c-4f35-af97-956365495e86.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/103a0312d019d00620e59ab047e0a4df.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f369bec2d5682bf6b8b317a08aff546.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f921b462ee12ad5749ea45d75f609b7.png)
您最近一年使用:0次
名校
解题方法
8 . 如图,在直四棱柱
中,底面
为直角梯形,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/9c634567-5b9c-4f46-9dab-956b8d5d903b.png?resizew=157)
(1)求证:
平面
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9060f03b9ee41d70d135b1e1a8902ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cead0e8eadfdcefa334953e88864f424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/386c7de62e8f9a8161ebaefe6b4ec35e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/9c634567-5b9c-4f46-9dab-956b8d5d903b.png?resizew=157)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b4cd2b33bd983a9ed6575b9de04a46a.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53cdc56590b42b154608b4cf19462fa0.png)
您最近一年使用:0次
2021-02-03更新
|
372次组卷
|
4卷引用:云南省曲靖市沾益县第四中学2020-2021学年高二上学期期末数学(文)试题
解题方法
9 . 如图,在三棱锥中P-ABC,PA
底面ABC,AB
AC,E、F分别是BC、PC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/1096d365-f77d-482f-9218-a22873362c03.png?resizew=158)
(1)证明:
平面
;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/1096d365-f77d-482f-9218-a22873362c03.png?resizew=158)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc90fee532e50d319081d571410421.png)
您最近一年使用:0次
名校
解题方法
10 . 如图,四边形
是边长为
的正方形,平面
平面
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/25/2698a95d-01f0-44c3-9e10-3478e11a6344.png?resizew=176)
(1)求证:
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72c766942d554e7f15ffec6eaacbe0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bce5d70b14ae05ad1eee6593a6ddfc0d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/25/2698a95d-01f0-44c3-9e10-3478e11a6344.png?resizew=176)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8511319e215aeba124994a03f2d91fcb.png)
您最近一年使用:0次
2020-11-16更新
|
617次组卷
|
5卷引用:云南省峨山彝族自治县第一中学2020-2021学年高二上学期期中考试数学(理)试题