名校
解题方法
1 . 如图,在边长为8的菱形
中,
,点
,
分别是边
,
的四等分点,
,
,
,
交于
点,沿
将
翻折到
,连接
,
,
,得到如图的五棱锥
,且
与底面
所成角的正弦值为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/49f20280-f89c-41e9-a847-f91d25f87096.png?resizew=464)
(1)求证:
平面
;
(2)求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4f5eec0addba78f2e0cdfb7ecc59a6.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3b7ff28dbeeedec243fc8eb7cb5d368.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc68246c6e5502b67fbcf3583dafe019.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/83cbcc0e404e813f42bad22853220347.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b7b2c0db9c5c5c0c82d3fa62bf5e5c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eafd8ea63ced193942ba59fcb24ae73b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11682da72980dde9834ba91c3d995e99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/49f20280-f89c-41e9-a847-f91d25f87096.png?resizew=464)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83efd6afec2f73c52e4b027a12d9f817.png)
(2)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a43c429d2676774d09e2509d9e26a0d.png)
您最近一年使用:0次
2013·湖南怀化·一模
名校
解题方法
2 . 如图1,
,过动点
作
,垂足
在线段
上且异于点
,连接
,沿
将
折起,使
(如图2所示),
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/10/8677db1f-f0c3-418a-b98a-838b801c7750.png?resizew=334)
(1)当
的长为多少时,三棱锥
的体积最大;
(2)当三棱锥
的体积最大时,设点
分别为棱
的中点,试在棱
上确定一点
,使得
,并求
与平面
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aa41b8cc912b518b764d1919ce14751.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5e1441a49e782ff0ef46e776cde06a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/587458141d890533c0c32aa249a27ad0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/10/8677db1f-f0c3-418a-b98a-838b801c7750.png?resizew=334)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f48dc419adb17eb12220f07480b077b8.png)
(2)当三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f48dc419adb17eb12220f07480b077b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5889e1f093f2c35273d3132ef8434e4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cca04b2a2b61d62a809776670a60c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5448218bd8c5b4f4a3714e0b0292d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4c865445dda4a59b6d5cb18fd74404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212a67f115d1cbe69f100b489babe5f8.png)
您最近一年使用:0次
2020-03-16更新
|
422次组卷
|
7卷引用:2019届湖北省武汉市新洲区部分高中高三上学期期末数学(理)试题
2019届湖北省武汉市新洲区部分高中高三上学期期末数学(理)试题(已下线)2013届湖南省怀化市高三第一次模拟考试理科数学试卷(已下线)2014届四川省雅安中学高三下学期3月月考理科数学试卷2016届吉林大学附中高三第二次模拟理科数学试卷贵州省遵义市遵义四中2018届高三第三次月考数学试题(已下线)押第19题立体几何-备战2021年高考数学临考题号押题(浙江专用)湖南省岳阳市岳阳县第一中学2022-2023学年高二下学期入学考试数学试题
解题方法
3 . 如图,
、
是以
为直径的圆上两点,
,
,
是
上一点,且
,将圆沿直径
折起,使点
在平面
的射影
在
上,已知
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/53bb030d-135e-4660-a269-1ed1e060e3d0.png?resizew=274)
(1)求证:
⊥平面
;
(2)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
平面
;
(3)求三棱锥
的体积.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee6700eacd559c8820a5a5631aee02d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.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/7e77686cf448ff6cea9bfc021581da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.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/3acee288e75061ac72203b09fce29904.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/53bb030d-135e-4660-a269-1ed1e060e3d0.png?resizew=274)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6261790c66cc71ee3898afabad0c09f4.png)
(3)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/217286e225eee4d5b7a7041c027393a1.png)
您最近一年使用:0次
2020-03-16更新
|
338次组卷
|
3卷引用:湖北省恩施州清江外国语学校2019-2020学年高二上学期期末数学试题
湖北省恩施州清江外国语学校2019-2020学年高二上学期期末数学试题(已下线)卷10-备战2020年新高考数学自学检测黄金10卷-《2020年新高考政策解读与配套资源》河南省焦作市2014-2015学年上学期高一学业水平测试数学试卷
名校
解题方法
4 . 正方体
的棱长为4,点
在棱
上,且
,点
是正方体下底面
内(含边界)的动点,且动点
到直线
的距离与点
到点
的距离的平方差为16,则动点
到
点的最小值是( ).
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5564681937f41e1489d69b20a71f9222.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-03-15更新
|
1000次组卷
|
6卷引用:湖北省武汉市第二中学2019-2020学年高二上学期期末数学试题
湖北省武汉市第二中学2019-2020学年高二上学期期末数学试题(已下线)强化卷07(3月)-冲刺2020高考数学之拿高分题目强化卷(山东专版)(已下线)期末重难点突破专题02-【尖子生专用】2021-2022学年高二数学考点培优训练(人教A版2019选择性必修第一册)安徽省六安市第一中学2020-2021学年高二下学期开学考试数学(理)试题(已下线)3.3 抛物线(难点)(课堂培优)-2021-2022学年高二数学课后培优练(苏教版2019选择性必修第一册)河南省南阳市第一中学校2023-2024学年高二下学期开学考试数学试题
名校
解题方法
5 . 如图,三棱柱
的侧面
是边长为2的菱形,
,且
.
![](https://img.xkw.com/dksih/QBM/2020/3/2/2410901713600512/2410952850251776/STEM/f1e1a89db9694b669975f5f770afde43.png?resizew=315)
(1)求证:
;
(2)若
,当二面角
为直二面角时,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/900e00a3609e6043af1034761d4d65f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7870cee007535b979d35bc7feab75616.png)
![](https://img.xkw.com/dksih/QBM/2020/3/2/2410901713600512/2410952850251776/STEM/f1e1a89db9694b669975f5f770afde43.png?resizew=315)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07e8af8caf4f395dc9a59903a7dba85a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39d31a4ddb10768e9e7868d0c34c425f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6997af36a239195f7b55557242cb03c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aab8cba157598642cb6b42734861a184.png)
您最近一年使用:0次
2020-03-02更新
|
838次组卷
|
2卷引用:湖北省部分重点中学(武汉1中,3中,6中,11中等六校)2018-2019学年高一下学期期末联考数学试题
解题方法
6 . 如图,在三棱柱
中,平面
平面
,
,
,
为棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/cee7a7be-de0b-4532-a734-18422ceadea7.png?resizew=141)
(1)证明:
;
(2)求三棱柱
的高.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61cdaadeae37736a1e6dd93fa1fe712f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8fba6dc92460fa44832398fd2868940.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4285e6b41d7c9f04e6d562dc9f514400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/cee7a7be-de0b-4532-a734-18422ceadea7.png?resizew=141)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea9a1c949c2bb591c1db240d7874b089.png)
(2)求三棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
您最近一年使用:0次
解题方法
7 . 已知三棱锥
的外接球的球心
恰好是线段
的中点,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c446e3781d636faf574d45faf8e51b64.png)
,则三棱锥
的体积为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c446e3781d636faf574d45faf8e51b64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/729d053d5e69f467e9c7c427436c2169.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
您最近一年使用:0次
解题方法
8 . 如图,在四棱锥
中,底面
为菱形,
,侧棱
底面
,
,点
为
的中点,作
,交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/21/da5721ec-2291-455f-8949-765058b540cd.png?resizew=127)
(1)求证:
平面
;
(2)求证:
;
(3)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/ea4f5eec0addba78f2e0cdfb7ecc59a6.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/37e2267c84394668eff2e9f5918de4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b7b9bf7332256ac478041957fa2a55a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/21/da5721ec-2291-455f-8949-765058b540cd.png?resizew=127)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/083b08552886374380117e5146525855.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96da3bd0a487a94ac02074500636938c.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1069d514c3c32aeabd274475ee209ed6.png)
您最近一年使用:0次
2020-02-16更新
|
4220次组卷
|
4卷引用:湖北省武汉市(第十五中学、十七中学、常青一中)2019-2020学年高二上学期期末数学试题
9 . 点
、
、
分别是正方体
的棱
,
,
的中点,则下列命题中的真命题是__________ (写出所有真命题的序号).
①以正方体的顶点为顶点的三棱锥的四个面中最多可以四个面都是直角三角形;
②点
在直线
上运动时,总有
;
③点
在直线
上运动时,三棱锥
的体积是定值;
④若
是正方体的面
,(含边界)内一动点,且点
到点
和
的距离相等,则点
的轨迹是一条线段.
![](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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
①以正方体的顶点为顶点的三棱锥的四个面中最多可以四个面都是直角三角形;
②点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e32cf73c01995c91c3523fa11b3bd7d.png)
③点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d8b73e5f21858fd4caabf9c086d0bbb.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
2020-02-16更新
|
160次组卷
|
2卷引用:湖北省武汉市(第十五中学、十七中学、常青一中)2019-2020学年高二上学期期末数学试题
名校
10 . 在如图所示的三棱柱
中,
底面ABC,
.
![](https://img.xkw.com/dksih/QBM/2020/1/27/2386303741878272/2387060068728832/STEM/2ef26ec4f7324aefb9eda2ecd77f28f6.png?resizew=116)
(1)若
,证明:
;
(2)若底面ABC为正三角形,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/220551e5754a52ab982f9f8b79bd9e5c.png)
![](https://img.xkw.com/dksih/QBM/2020/1/27/2386303741878272/2387060068728832/STEM/2ef26ec4f7324aefb9eda2ecd77f28f6.png?resizew=116)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7768503b1ad4775258b2f1a71c413086.png)
(2)若底面ABC为正三角形,求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
您最近一年使用:0次
2020-01-28更新
|
651次组卷
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5卷引用:湖北省恩施州2022届高三上学期期末文科数学试题