如图,在边长为1的正方体
中,
是棱
上的一个动点,给出下列四个结论,其中正确的是( )
![](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/2777840758e70e7dbbc18cef8f3d6d2b.png)
A.三棱锥![]() ![]() |
B.存在点![]() ![]() ![]() |
C.![]() ![]() ![]() ![]() ![]() ![]() ![]() |
D.对每一个点![]() ![]() ![]() ![]() ![]() ![]() |
22-23高一下·北京密云·期末 查看更多[5]
北京市密云区2022-2023学年高一下学期期末数学试题(已下线)专题6-2立体几何截面与最值归类-2(已下线)专题06 空间中点线面的位置关系6种常考题型归类(2) -期期末真题分类汇编(北京专用)(已下线)专题08立体几何期末14种常考题型归类(2) -期末真题分类汇编(人教B版2019必修第四册)【北京专用】专题15立体几何与空间向量(第四部分)-高一下学期名校期末好题汇编
更新时间:2023-08-05 10:09:35
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【推荐1】秦九韶是我国南宋时期的著名数学家,他在著作《数书九章》中提出,已知三角形三边长计算三角形面积的一种方法“三斜求积术”,其公式为:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1343936f0c49edcc38150b7b7c43e7b5.png)
.若
,
,
,则利用“三斜求积术”求
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1343936f0c49edcc38150b7b7c43e7b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fabda43f599d802a6f71e0db08f49686.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5248f004abb3f4132fe5edc6694fbbe1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55493e331f88d3d1c396e92b46c97ecd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce613eaa5df46a50174085ef5d1087fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】在
中,角
,
,
所对应的边长分别为
,
,
,面积为
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cf4e80289247b2c0587c32091c4bd19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e33e8045277a342dbbaff481815bd532.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】已知四面体
中,平面
平面
,
是边长为
的等边三角形,
,
,则四面体
的体积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/31e0b2be-335b-4cf3-873d-e16fffe305d6.jpg?resizew=193)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532aece6cfd67e2a97977eed978dbf2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff9c7cbcc38b28d45c8539710e5b260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/31e0b2be-335b-4cf3-873d-e16fffe305d6.jpg?resizew=193)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】在三棱锥P﹣ABC中,平面PBC⊥平面ABC,∠ACB=90°,BC=PC=2,若AC=PB,则三棱锥P﹣ABC体积的最大值为( )
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】已知正方体
中,点
是线段
的中点,则下列说法正确的是( )
![](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/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
A.直线![]() ![]() ![]() | B.直线![]() ![]() |
C.点![]() ![]() | D.直线![]() ![]() |
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【推荐2】如图,直三棱柱
中,底面三角形
是正三角形,E是BC中点,则下列叙述正确的是( )
![](https://img.xkw.com/dksih/QBM/2022/1/11/2892244404011008/2893088465510400/STEM/2a0a42eaaf154b95b0108c986eef07d9.png?resizew=152)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
![](https://img.xkw.com/dksih/QBM/2022/1/11/2892244404011008/2893088465510400/STEM/2a0a42eaaf154b95b0108c986eef07d9.png?resizew=152)
A.![]() ![]() | B.![]() |
C.AE,![]() ![]() | D.![]() ![]() |
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【推荐1】如图所示,在直三棱柱
中,
,
,
,
分别为
,
的中点,
为线段
上一点,设
,
,
,给出下面几个命题:
①
的周长
,
,
是单调函数,当且仅当
时,
的周长最大;
②
的面积
,
,
满足等式
,当且仅当
时,
的面积最小;
③三棱锥
的体积为定值.
其中正确的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/18/06871b05-ac70-44ab-b888-269f34f56e2e.png?resizew=172)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3038d4728f959a8efedc2592e4a4b5fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ad04b9df1032e5d2953e45d238da08d.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eadb6f330e2d5325adb08c2b1d80b1ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80310a4c50d1164cdeaf37b2f1f2791b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3038d4728f959a8efedc2592e4a4b5fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ad04b9df1032e5d2953e45d238da08d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eadb6f330e2d5325adb08c2b1d80b1ae.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eadb6f330e2d5325adb08c2b1d80b1ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e272600e46db2fc93d58245e31582f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3038d4728f959a8efedc2592e4a4b5fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ad04b9df1032e5d2953e45d238da08d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de9d8593e9be802bdd6eb6058929acfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b650820d7bed48ed67a2869ad8c65ff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eadb6f330e2d5325adb08c2b1d80b1ae.png)
③三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e49a580c36592fae31cb4e4f016f68e2.png)
其中正确的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/18/06871b05-ac70-44ab-b888-269f34f56e2e.png?resizew=172)
A.0 | B.1 | C.2 | D.3 |
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【推荐2】坡度是地表单元陡缓的程度,通常把坡面的垂直高度和水平方向的距离的比叫做坡度,就是坡面与水平面成角的正切值.如图所示,已知斜面
的坡度是1,某种越野车的最大爬坡度数是30°,若这种越野车从D点开始爬坡,则行驶方向
与直线
的最大夹角的度数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/21/6c23e261-7e10-4de8-820a-87600e63d257.png?resizew=222)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/21/6c23e261-7e10-4de8-820a-87600e63d257.png?resizew=222)
A.30° | B.45° | C.60° | D.75° |
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