1 . 若直线
与圆
相交于
,
两点,
为圆心,且
,则
的值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d5d58c8c55fc8dac4fcdf3221300316.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba36b036d6f6ed5e3cc9cea517f299f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5cfc1bf92a95252ef7b810d8d889d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
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2 . 如图,若三棱柱
的底面面积为
,高为
,则三棱锥
的体积为_________ .(用
,
表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71f2185273bf04c11118c7954f7ec822.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad13e989971172d87bacd2bdabb8bef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/3/8c6f8c5c-3d25-482f-863b-2013859ec393.png?resizew=130)
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2018-02-02更新
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262次组卷
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2卷引用:北京市朝阳区2017-2018学年高二上学期期末考试数学(文)试题
3 . 如图,在四棱锥
中,四边形
为菱形,
底面
.
(Ⅰ)求证:
;
(Ⅱ)若
,
分别为线段
,
的中点,求证:
平面
.
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/945efbd2a73b8f37b115b56f4f3ea937.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7175df06e33cad4e6bbc3f2f6b0a2986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8108a65dfe2e5f92ef737103590a5ab4.png)
![](https://img.xkw.com/dksih/QBM/2018/1/29/1870827596054528/1873521379803136/STEM/1d2b7db5c8184f9f9492d4ed6e5245d9.png?resizew=250)
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4 . 如图,已知正方体
的棱长为
,
,
,
分别为棱
,
和
的中点,则三棱锥
的体积为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.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/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e431f2113ee79e5f2a223f00bff81c0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/25/aefcb154-6a20-4578-a3e6-37d1db522471.png?resizew=176)
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5 . 在空间直角坐标系
中,点
关于平面
对称的点的坐标为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e336d6ca2cae3d6e6c3810d7e521a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d331a418f7ad8f9988d6045761730de7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d96461d2b3421aed548b754637ca8a.png)
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2018-02-02更新
|
401次组卷
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3卷引用:北京市朝阳区2017-2018学年高二上学期期末考试数学(理)试题
6 . 已知如图为某三棱锥的三视图,则该三棱锥的表面积为
![](https://img.xkw.com/dksih/QBM/2018/3/30/1913382727262208/1917073027883008/STEM/2b321cfbc0fe46988ca85de23337d83a.png?resizew=155)
![](https://img.xkw.com/dksih/QBM/2018/3/30/1913382727262208/1917073027883008/STEM/2b321cfbc0fe46988ca85de23337d83a.png?resizew=155)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
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2018-02-02更新
|
294次组卷
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3卷引用:北京市朝阳区2017-2018学年高二上学期期末考试数学(理)试题
7 . 已知圆
:
,圆
:
,则两圆的位置关系为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8fe0c4c4a65c0132f318a23278a695.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4f6f74444b2b7947fc6e35c8d62322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/777f24fed681c4b2b28349fa8325ac99.png)
A.外离 | B.外切 | C.相交 | D.内切 |
您最近一年使用:0次
2018-02-02更新
|
463次组卷
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2卷引用:北京市朝阳区2017-2018学年高二上学期期末考试数学(理)试题
解题方法
8 . 如图,在三棱锥
中,
,
,
分别是侧棱
,
,
的中点. 给出下列三个结论:①
平面
;②平面
平面
;③三棱锥
与三棱锥
的体积比为
.其中正确的个数是
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/20/7d3a6982-6d73-4595-bccd-f5b2188c9642.png?resizew=151)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.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/a0ed1ec316bc54c37c4286c208f55667.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/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08f8b463fcecf0a757f386db56e074d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3febf04c5726ce8133a7937fe4565c68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16fd1bc6147d69777b26a35d48522f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa9c934d84feba963335cc7edf01610e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/20/7d3a6982-6d73-4595-bccd-f5b2188c9642.png?resizew=151)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2018-02-02更新
|
454次组卷
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2卷引用:北京市朝阳区2017-2018学年高二上学期期末考试数学(理)试题
名校
9 . 设
,
是两条不同的直线,
,
,
是三个不同的平面,则下列命题为假命题 的是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f435efcc7869eec21bdba1ed81dc3f5.png)
A.若![]() ![]() ![]() ![]() | B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() | D.若![]() ![]() ![]() ![]() |
您最近一年使用:0次
2018-02-02更新
|
248次组卷
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3卷引用:北京市朝阳区2017-2018学年高二上学期期末考试数学(理)试题
10 . 如图,在三棱柱
中,
,
是线段
的中点,且
平面
.
![](https://img.xkw.com/dksih/QBM/2018/1/20/1864574974992384/1866092722855936/STEM/bc8c58ee6f5a4bfebb664271b78d0b6f.png?resizew=226)
(Ⅰ)求证:平面
平面
;
(Ⅱ)求证:
平面
;
(Ⅲ)若
,
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ed8f7d3d7043d4b1eb98fc5c4e2fcd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4890e58791814622b87c4d60ea971f54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/2018/1/20/1864574974992384/1866092722855936/STEM/bc8c58ee6f5a4bfebb664271b78d0b6f.png?resizew=226)
(Ⅰ)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21dee56b9f36ba8f76fe67b76383636b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
(Ⅱ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/547a4b438e2e6687c7cd55ea08bbaae2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
(Ⅲ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f88e7df45acca3fc3d3da3370f0c32bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209acf15985d1ea1ad86fc4a37e38c0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91441b6a208013fa5e8ddf7c8cd1f43d.png)
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