名校
1 .
是⊙O的直径,点
是⊙O上的动点(点
不与
重合),过动点
的直线
垂直于⊙O所在的平面,
分别是
的中点,则下列结论中正确的是________ (填写正确结论的序号).
(1)
;(2)
;(3)
;(4)
.
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a392d05d3cfcbb438569b1ea9980dc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41cea8fb588b2c654e32c9ec0e3a191.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e984dfefbddd93b0d196c18376ec7213.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01be64cb223ca0ac785a8740948188f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fbf56c2cf2688c1fba1b7b384bf6678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
您最近一年使用:0次
2017-12-03更新
|
390次组卷
|
2卷引用:【全国百强校】福建省晋江市南侨中学2018-2019学年高一下学期第二次月考数学试题
解题方法
2 . 在正方体
中,点
分别为线段
,
上的动点,且
,则以下结论错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd4c85bb98a2a0afddd7ed92578ad2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aae6dcda87d7f85b91715c029b558ada.png)
A.![]() ![]() |
B.平面![]() ![]() |
C.![]() ![]() ![]() |
D.![]() ![]() ![]() |
您最近一年使用:0次
3 . 如图所示,四棱锥
底面是直角梯形,点E是棱PC的中点,
,
底面ABCD,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/82ad25b9-5b40-428f-86f3-dc6c6489a68c.png?resizew=177)
(1)判断BE与平面PAD是否平行,证明你的结论;
(2)证明:
平面
;
(3)求三棱锥
的体积V.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/010b36a106cdbccc0ea4e5cc35e51a5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b72c6d2ae4924f930c437542b3356a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/82ad25b9-5b40-428f-86f3-dc6c6489a68c.png?resizew=177)
(1)判断BE与平面PAD是否平行,证明你的结论;
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662698361c6b3ddaf0c28a3c87be53e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
(3)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d00bae294d76d2cfaf11520e20409c05.png)
您最近一年使用:0次
4 . 如图,一张A4纸的长宽之比为
,
分别为
,
的中点.现分别将△
,△
沿
,
折起,且
,
在平面
同侧,下列命题正确的是__________ .(写出所有正确命题的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14eec658f69c267a70c1e8f9b744e282.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87e1fe20bb0e8292e993657e14bc79a.png)
①,
,
,
四点共面;
②当平面平面
时,
平面
;
③当,
重合于点
时,平面
平面
;
④当,
重合于点
时,设平面
平面
,则
平面
.
您最近一年使用:0次
2018-01-13更新
|
243次组卷
|
2卷引用:福建省泉州市2018届高中毕业班1月单科质量检查数学理试题
5 . 如图1,在
中,
,
、
分别为
,
的中点,点
为线段
上一点,将
沿
折起到
的位置,使
,如图2.
![](https://img.xkw.com/dksih/QBM/2017/7/8/1732911343869952/1790904252121088/STEM/176c7e334bb24dca9e5da21c47a7d0c0.png?resizew=251)
(I)求证:
∥平面
;(II)求证:
;
(Ⅲ)若
为线段
中点,求证:
⊥平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa8cee7d2463f6f7d352e8b65f47cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f460edcced5597615113c0fdc95b1dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f07107087ce4abdfa5fc68fe6fb62f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3f7be7700b3b4177237b841636ccc5d.png)
![](https://img.xkw.com/dksih/QBM/2017/7/8/1732911343869952/1790904252121088/STEM/176c7e334bb24dca9e5da21c47a7d0c0.png?resizew=251)
(I)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58f6c650180e3c024d0a49c50bbfb2c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/206b3689e55f0ad11910f7a5519671af.png)
(Ⅲ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a29292b2a3a66375202bca1fb986ecb6.png)
您最近一年使用:0次
6 . 如图所示,在直四棱柱
中,底面
为菱形,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
且
,
为侧棱
的中点,
分别是线段
和线段
上的动点(含端点),且满足
,当
运动时,下列结论中正确的序号是_____________ .
![](https://img.xkw.com/dksih/QBM/2019/11/29/2344263075061760/2345277408002048/STEM/4fc773a92ba04c0884d55284763fdaad.png?resizew=170)
①在△
内总存在与平面
平行的线段;
②平面
⊥平面
;
③三棱锥
的体积为定值;
④△
可能为直角三角形.
![](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/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed6297db02191f6d644ed14020e25c93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76b02c5fd28edeef3ab071cccc587800.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/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/197a20346d81db8c8eee9e06239c1b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://img.xkw.com/dksih/QBM/2019/11/29/2344263075061760/2345277408002048/STEM/4fc773a92ba04c0884d55284763fdaad.png?resizew=170)
①在△
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed4cba9d2412e4a28f8740bddd5738d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
②平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed4cba9d2412e4a28f8740bddd5738d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
③三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea9761f5d1c70ca6c9b167e671b44c16.png)
④△
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed4cba9d2412e4a28f8740bddd5738d4.png)
您最近一年使用:0次