名校
1 . 如图,在三棱锥
中,△
为等腰直角三角形,
,
,△
为正三角形,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/2bf04990-e111-4041-bbc3-3b9c8bfa5c04.png?resizew=155)
(1)证明:平面
平面
;
(2)若棱锥
的体积为
,求平面
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb96e0331eebe80ed1ff610faf531fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/2bf04990-e111-4041-bbc3-3b9c8bfa5c04.png?resizew=155)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21e6dc2c16b657672402b9b189d1ad04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)若棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
您最近一年使用:0次
2021-08-04更新
|
645次组卷
|
3卷引用:山东省菏泽市2020-2021学年高一下学期期末数学试题
解题方法
2 . 如图,四边形
是边长为4的菱形,
,
平面
,将菱形
沿对角线
折起,使得点
到达点
的位置,且平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/45acf5dc-a94e-4522-88b9-813ee644fc19.png?resizew=213)
(1)求证:
平面
;
(2)若点
在同一个球面上,求三棱锥
与三棱锥
的公共部分的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/953f11eb95bfc036d85b472f81c6fb4e.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c9156bbbb897ca199c8257fc227ebcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/45acf5dc-a94e-4522-88b9-813ee644fc19.png?resizew=213)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c2b786c64e6a9ed2ec5670cde74f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df7fdfebdbaddc49e8991ec47d2fb076.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2254ae091ab23056b2ef83b8db517cd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddfe0ccf24d760c77535a70c92dad145.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3a264334976ed7875f109b28533ff20.png)
您最近一年使用:0次
3 . 某种“笼具”由内,外两层组成,无下底面,内层和外层分别是一个圆锥和圆柱,其中圆柱与圆锥的底面相同,圆柱有上底面,制作时接头忽略不计.已知圆柱的底面周长为
,高为
,圆锥的母线长为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/24e16fad-c3b6-4db0-ba76-e13401b16c68.png?resizew=106)
(1)求这种“笼具”的体积;
(2)现要使用一种纱网材料制作100个“笼具”,该材料的造价为每平方米4元,共需多少元?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fbcd3fa5795f3dbe4da141be709cad2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3668a3f3ce5b8a272ad92c2ebd233f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbe9f7abf7bcf4e1aa2579cd191d7761.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/24e16fad-c3b6-4db0-ba76-e13401b16c68.png?resizew=106)
(1)求这种“笼具”的体积;
(2)现要使用一种纱网材料制作100个“笼具”,该材料的造价为每平方米4元,共需多少元?
您最近一年使用:0次
解题方法
4 . 如图(1)所示,中心为
边长为
的正方形
,
、
、
、
分别为
、
、
、
上的点,
,如图(2)所示,把
和
分别沿
、
折起,使二面角
的大小为
,二面角
的大小为
.
![](https://img.xkw.com/dksih/QBM/2021/7/15/2764794796138496/2777733767168000/STEM/a6ee0c61-7d2a-4d8d-8f24-31e1728f0cc3.png?resizew=469)
(Ⅰ)判断多面体
是否为三棱柱;(只需回答结论)
(Ⅱ)证明:
平面
;
(Ⅲ)求多面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bc0b3441658b3daf3710909ad16f441.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ded15467b6a0d3b56fd1cdf5a41a5122.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e977cb08909ddb77a8c1236bca620ac5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e31769b3bcdd90a605eeb22e9efbc6f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0745c40a9cd9035859fb15ee004d48e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231b861d6d1f1d0b9f52b041cb40eb62.png)
![](https://img.xkw.com/dksih/QBM/2021/7/15/2764794796138496/2777733767168000/STEM/a6ee0c61-7d2a-4d8d-8f24-31e1728f0cc3.png?resizew=469)
(Ⅰ)判断多面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8219707beeae1ba4bbb328d1b7224c06.png)
(Ⅱ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeebdf3d00c146a1b4d220909d7573c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
(Ⅲ)求多面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb19d9e7cdaf923049655a7ba1a26c35.png)
您最近一年使用:0次
5 . 如图,在几何体
中,四边形
是菱形,且
,
平面
,
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/7f121158-b27e-4f45-a781-99be0eded452.png?resizew=191)
(
)证明:平面
平面
;
(
)若二面角
为
,求几何体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6906f59d09ce31956d6f5ea2b23fc77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662698361c6b3ddaf0c28a3c87be53e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27fcafd4e3c295eed2ab9c92c3d4a36b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/179071147b940f5e2f80e74526cebf92.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/7f121158-b27e-4f45-a781-99be0eded452.png?resizew=191)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8dc6db50a9709c3f4d84eee7bdf1250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2443a94bed3d2b1f95c04ebd61ac134a.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5617a404c5a3356753136e5a6b6d51e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
您最近一年使用:0次
2021-08-02更新
|
487次组卷
|
2卷引用:山东省日照市2020-2021学年高一下学期期末校际联合数学试题
6 . 如图所示的几何体,是由棱长为2的正方体
截去一个角后所得的几何体.
![](https://img.xkw.com/dksih/QBM/2021/7/6/2758556305981440/2766887251738624/STEM/d96f9fed-dbc5-4e77-b8e0-7177828446d1.png?resizew=246)
(1)试画出该几何体的三视图(主视图投影面平行平面
,主视方向如图所示);
(2)若截面
是边长为2的正三角形,求该几何体的体积
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/2021/7/6/2758556305981440/2766887251738624/STEM/d96f9fed-dbc5-4e77-b8e0-7177828446d1.png?resizew=246)
(1)试画出该几何体的三视图(主视图投影面平行平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b54387f870ae37f7951b253665d64f6.png)
(2)若截面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40304b883f3d23bbf066bc0af3c09862.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
您最近一年使用:0次
名校
解题方法
7 . 如图,在直角梯形
中,
,
,
,
.
平面
,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/2021/7/12/2762390284443648/2764081889214464/STEM/d8942415bc8a4cee988f59a4b4f70b02.png?resizew=164)
(1)求证:
平面
;
(2)若
,
,求多面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cd6c45556e76af03be8b521396bed6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84e0b7d845cbceccd3e76ca461fcc534.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a36f7e5128bcf12583792fe8a4a4d8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42685c851148cafa4c193c627c1b8484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2021/7/12/2762390284443648/2764081889214464/STEM/d8942415bc8a4cee988f59a4b4f70b02.png?resizew=164)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d0492b25f10ae45c39f8e9838519259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38c5c9cc1ed4bce98b7fae77e70b227f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf394a6f336510a2d3b998e5024304f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
您最近一年使用:0次
名校
解题方法
8 . 某同学在劳动实践课上制作了一个如图所示的容器,其上半部分是一个正四棱锥,下半部分是一个长方体,已知正四棱锥
的高是长方体
高的
,且底面正方形
的边长为4,
.
的长及该长方体的外接球的体积;
(2)求正四棱锥的斜高和体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
(2)求正四棱锥的斜高和体积.
您最近一年使用:0次
2021-07-11更新
|
570次组卷
|
5卷引用:山东省潍坊市2020-2021学年高一下学期期末数学试题
名校
9 . 如图,已知正三棱锥
的侧面是直角三角形,
,顶点
在平面
内的正投影为点
,
在平面
内的正投影为点
,连接
并延长交
于点
.作
交
于
.
(1)证明:
是
的中点;
(2)证明:
面
;
(3)过点
作
面
,
为垂足,求三棱锥
的外接球体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c19f0fcacac715a1200770516d1e4a67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e43bfff55b8c8166c261088a9d0233f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/a92cb0ab-971a-4d13-b456-6ab20b12442a.png?resizew=237)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d07d16fc91aa960b67ba4b474de8a62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(3)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16fd1bc6147d69777b26a35d48522f7e.png)
您最近一年使用:0次
2021-07-10更新
|
101次组卷
|
2卷引用:黑龙江省牡丹江市第二高级中学2022-2023学年高一下学期期末数学试题
10 . 如图所示,四棱锥
中,
菱形
所在的平面,
,点
、
分别是
、
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/99cfd6fc-4228-415a-aedd-25704a5ca33c.png?resizew=165)
(1)求证:平面
平面
;
(2)当
时,求多面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/e075468e7fb0bf30229aec01a7205977.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/99cfd6fc-4228-415a-aedd-25704a5ca33c.png?resizew=165)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6501f1c913a4ef64957a2f01ab5baa15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9b5d2943803894bc5d204e75e2d172b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd06964bc180eeb26209b77a69ab763e.png)
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4卷引用:江西省万载中学2020-2021学年高一下学期期末考试数学(文)试题