名校
解题方法
1 . 如图,
是边长为
的等边三角形,
分别在边
上,且
,
为
边的中点,
交
于点
,沿
将
折到
的位置,使
.
![](https://img.xkw.com/dksih/QBM/2022/3/17/2938055260528640/2938766415732736/STEM/4af951b9009e4b49b65297598c75cd06.png?resizew=182)
(1)证明:
平面
;
(2)若平面
内的直线
平面
,且与边
交于点
,
是线段
的中点,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a36c8ba3a183222fb7ec83bddf8b30c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bde89cfc58a166b6a985f640fd174fd0.png)
![](https://img.xkw.com/dksih/QBM/2022/3/17/2938055260528640/2938766415732736/STEM/4af951b9009e4b49b65297598c75cd06.png?resizew=182)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7b7675ff57bdccb95a8241c1cd09f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a03952d664fba91020fc5f3bcf2f9746.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a03952d664fba91020fc5f3bcf2f9746.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/752dc3cc77f0d0ec4a1d0981970410a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fbb5d97a06c189af2032a1b551ca0ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b41eda406756ba4d5588460665f7012.png)
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5卷引用:甘肃省2022届高三下学期第一次高考诊断数学(文)试题
2 . 已知长方体
,
,
分别为
和
的中点,
.
体积;
(2)求证:平面
平面
.
![](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/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4fecc96e6e9459fc057da587e9d5e05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/372d3d3a8b95f9a9b76696ec9e8e6bf5.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/881c547438391d02b79c4fe20886589a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
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2022-03-03更新
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3卷引用:甘肃省天水市第一中学2023-2024学年高一下学期第二次段中检测(6月)数学试题
解题方法
3 . 如图,在四棱锥P-ABCD中,底面ABCD是平行四边形,
,
,
,
,点M是AB的中点,点N是线段BC上的动点.
![](https://img.xkw.com/dksih/QBM/2022/1/17/2896530954575872/2916870765772800/STEM/9bdecf3a-7c61-46f5-b081-ae0c3aa8a3ac.png?resizew=171)
(1)证明:
平面PAB;
(2)若点N到平面PCM的距离为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37c043da5fc1c1432e9224b2e72a37d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b96fac11d72f72c805dbddb8da72d68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b58bbc02479917ad761a24eaae0dbfd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b56dd5ca8a90607d8ea2d27f23c2a822.png)
![](https://img.xkw.com/dksih/QBM/2022/1/17/2896530954575872/2916870765772800/STEM/9bdecf3a-7c61-46f5-b081-ae0c3aa8a3ac.png?resizew=171)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34cf61780928291d51c7bbb08a5fcf81.png)
(2)若点N到平面PCM的距离为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ca820a456491348e72587e4fe10bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48732e80ec3c3b6de906d598c69840d5.png)
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2022-02-15更新
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2卷引用:甘肃省兰州市第五十中学2022-2023学年高三下学期开学摸底考试数学(文科)试题
4 . 如图,
是圆
的直径,
圆
所在的平面,
为圆周上一点,
为线段
的中点,
,
.
![](https://img.xkw.com/dksih/QBM/2022/1/13/2893775135039488/2896413231874048/STEM/5c78035e-bc9c-4ee3-bc39-4c2bbc6bc4e5.png?resizew=218)
(1)证明:平面
平面
.
(2)若
为
的中点,
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ca0b614cdcebac47b434db4aa75b518.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ff7ad82b0938145af6a5ffa2c9596d8.png)
![](https://img.xkw.com/dksih/QBM/2022/1/13/2893775135039488/2896413231874048/STEM/5c78035e-bc9c-4ee3-bc39-4c2bbc6bc4e5.png?resizew=218)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ee01e28681b584f85c8875f053b77b.png)
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2022-01-17更新
|
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4卷引用:甘肃省白银市靖远县2021-2022学年高三上学期期末考试数学(文)试题
5 . 正方体
的棱长为2,且
,过P作垂直于平面
的直线l,l交正方体
的表面于M,N两点.下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f5b984fc1980279e9e4e532c93d5136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2bf9ef324f1289e205e29fed105c38e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
A.![]() ![]() |
B.四边形![]() ![]() |
C.若四边形![]() ![]() ![]() |
D.若![]() ![]() ![]() |
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3卷引用:甘肃省白银市靖远县2021-2022学年高二上学期期末数学(理)试题
甘肃省白银市靖远县2021-2022学年高二上学期期末数学(理)试题甘肃省庆阳市2021-2022学年高二上学期1月月考数学(理)试题(已下线)解密11 空间几何体(分层训练)-【高频考点解密】2022年高考数学二轮复习讲义+分层训练(新高考专用)
名校
解题方法
6 . 已知某几何体的三视图如图所示,则该几何体的体积为___________ .
![](https://img.xkw.com/dksih/QBM/2022/1/5/2887789465378816/2888721245642752/STEM/f146df751afb4152a989eda62cf9a0ae.png?resizew=216)
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5卷引用:甘肃省武威第一中学2021-2022学年高三上学期开学考试文科数学试题
甘肃省武威第一中学2021-2022学年高三上学期开学考试文科数学试题贵州省贵阳市第一中学2021届高三下学期高考适应性月考卷(六)数学(理)试题贵州省贵阳市第一中学2021届高三下学期高考适应性月考卷(六)数学(文)试题(已下线)专题06 三视图-备战2022年高考数学(理)母题题源解密(全国甲卷)(已下线)专题07 三视图-备战2022年高考数学(文)母题题源解密(全国甲卷)
7 . 如图1,正方形
中,
,
,将四边形
沿
折起到四边形
的位置,使得
(如图2).
![](https://img.xkw.com/dksih/QBM/2021/12/13/2871730622701568/2874299759689728/STEM/a84d1eed2477401585ece053e9a1e97b.png?resizew=377)
(1)证明:平面
平面
;
(2)若
分别为
的中点,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c313fea2b6a674896d41950e939fe07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e3988ef02a1132c7dbcd682559c2a2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/515f2668c6ab5e6d0679218ea9c8e4be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ac79e422ba4876949f0514c44539b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da9a5b1190029c438c3a7927fa8f217.png)
![](https://img.xkw.com/dksih/QBM/2021/12/13/2871730622701568/2874299759689728/STEM/a84d1eed2477401585ece053e9a1e97b.png?resizew=377)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/643701e7855ef0458513290a99b78f23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/712d9d9e29645c1df6ae23125b4aa1cc.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e4d7503a7d57ba242ad4e05c7006a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67028ba8e1713be0bb98e5d760d8b8e5.png)
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7卷引用:甘肃省张掖市2021-2022学年高三上学期期末数学(文)试题
甘肃省张掖市2021-2022学年高三上学期期末数学(文)试题贵州省毕节市2022届高三上学期诊断性考试(一)数学(文)试题陕西省渭南市2022届高三教学质量检测(一)文科数学试题(已下线)专题23 立体几何(文科)解答题20题-备战2022年高考数学冲刺横向强化精练精讲河南省顶尖名校2021-2022学年高三下学期第三次素养调研文科数学试卷(已下线)押全国卷(文科)第19题 立体几何-备战2022年高考数学(文)临考题号押题(全国卷)陕西省渭南市临渭区渭南市三贤中学2024届高三上学期12月月考数学(文)试题
名校
解题方法
8 . 如图,在四棱锥P-ABCD中,四边形ABCD为菱形,PA=AB=2,PB=
,∠ABC=60°,且平面PAC⊥平面ABCD.
(2)若M是PC上一点,且BM⊥PC,求三棱锥M-BCD的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
(2)若M是PC上一点,且BM⊥PC,求三棱锥M-BCD的体积.
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10卷引用:甘肃省张掖市某重点校2022-2023学年高三上学期第七次检测数学(文)试题
甘肃省张掖市某重点校2022-2023学年高三上学期第七次检测数学(文)试题河北省衡水中学2021届全国高三下学期第二次联合考试(II卷)数学(文)试题广西玉林市2022届高三11月第一次统考数学(文)试题广西玉林市2022届高三上学期教学质量监测数学(文)试题江西省宜春市上高二中2022届高三上学期第五次月考数学(文)试题四川省南充高级中学2021-2022学年高三第六次月考数学(文)试题(已下线)易错点10 立体几何-备战2022年高考数学考试易错题(新高考专用)山西省晋中市平遥县第二中学校2022-2023学年高一下学期5月月考数学试题云南省开远市第一中学校2023-2024学年高二上学期开学考试数学试题陕西省西安市陕西师范大学附属中学2023-2024学年高一下学期期中考试数学试题
9 . 在长方体
中,
,过
、
、
三点的平面截去长方体的一个角后,得到如图所示的几何体
,且这个几何体的体积为10.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/20d99a9d-b88a-411f-afd7-5f1d0e7ac8cf.png?resizew=156)
(1)求棱
的长;
(2)若
的中点为
,求异面直线
与
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52eab6de89f4d4e69650e94e0968744.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/20d99a9d-b88a-411f-afd7-5f1d0e7ac8cf.png?resizew=156)
(1)求棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b3920d41295bb20983cd9945cb18f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
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2021-12-11更新
|
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7卷引用:2017届甘肃省肃南裕固族自治县第一中学高三上学期期末考试数学(理)试卷2
2017届甘肃省肃南裕固族自治县第一中学高三上学期期末考试数学(理)试卷2(已下线)2011届山西省忻州市高三第一次联考数学文卷2016届青海省平安一中高三4月月考理科数学试卷2016届青海省平安一中高三4月月考文科数学试卷2017届宁夏石嘴山三中高三上学期月考一数学(文)试卷上海市徐汇区南洋模范中学2021-2022学年高二上学期期中数学试题(已下线)第03讲 异面直线所成的角(核心考点讲与练)-2022-2023学年高二数学考试满分全攻略(沪教版2020必修第三册)
10 . 在棱长为
的正方体
中,
是
的中点,则点
到平面
的距离是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9af29254fe60a392c249c5791279e9c8.png)
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2021-12-03更新
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2卷引用:甘肃省天水市武山县第一高级中学2023届高三上学期第二次诊断模拟数学试题