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1 . 下列说法中,错误的为( )
A.有一个面是多边形,其余各面都是三角形的几何体是棱锥; |
B.有两个面互相平行,其余四个面都是等腰梯形的六面体是棱台; |
C.底面是等边三角形,侧面都是等腰三角形的三棱锥是正三棱锥; |
D.棱锥的侧棱长与底面多边形的边长相等,则此棱锥不可能是正六棱锥. |
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2 . 如图1,在等腰梯形
中,
,
,
,
,
,将四边形
沿
进行折叠,使
到达
位置,且平面
平面
,连接
,
,如图2,则( )
![](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/ab00e0cff0876c4183a47f1272cf9928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f30e3e19f2daf6c6bdbaace49aae2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86338536656046e93b53672ade9a78b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d400782997029c78349ab203df309b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/946c16d99496d31ce4d87301a4793393.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284750727aa2c32b2477d126daefb329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a5e47abdf167620c32071f5c018fe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a28d6477c85c5a4ac410a884e92fbe53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e663220a66eff19da6a71e46b397db2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5d9c105f5558d48cc42218ed2b3ef4a.png)
A.![]() | B.平面![]() ![]() |
C.多面体![]() | D.直线![]() ![]() ![]() |
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7日内更新
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683次组卷
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7卷引用:河北省保定市九校2024届高三下学期二模数学试题
河北省保定市九校2024届高三下学期二模数学试题山西省晋城市2024届高三第三次模拟考试数学试题浙江省强基联盟2024届高三下学期5月全国“优创名校”联考数学试题(已下线)第四套 艺体生新高考全真模拟 (三模重组卷)辽宁省抚顺市六校协作体2024届高三下学期5月模拟考试数学试卷(已下线)专题4 立体几何中的动态问题【讲】(已下线)核心考点8 立体几何中综合问题 B提升卷 (高一期末考试必考的10大核心考点)
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解题方法
3 . 已知平面
平面
,A,
且A,
,C,
且C,
,E,
,且
,
,下列说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/670684ed4962fcebce7b5a140510d066.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4f17a8dbdeec924d5cb55954f2c7655.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf2a47e92905ab5564a0c60951d332a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7447cd809ebd601b1a033ec392de0f48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaccf1887c4b530fd86a2f0f199c6797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07e9acf84f5b8dad7be952546b20a154.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2c4d06ea18310331d47da1cd2a5a7e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e77a906a317863df81327e97ae0d5e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d96b2d46188702a6e3a41463593b7db.png)
A.若![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() ![]() |
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2024-04-26更新
|
1149次组卷
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2卷引用:广东省佛山市2024届高三下学期教学质量检测(二)数学试题
解题方法
4 . 已知正三棱台中,
的面积为
,
的面积为
,
,棱
的中点为
,则( )
A.该三棱台的侧面积为![]() | B.该三棱台的高为![]() |
C.![]() ![]() | D.二面角![]() ![]() |
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2024-02-14更新
|
618次组卷
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4卷引用:河南省安阳市2024届高三第一次模拟考试数学试卷
解题方法
5 . 如图,在三棱台
中,
表示体积,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/19/e6b9517a-7e53-4f45-9050-29ce4e843444.png?resizew=151)
A.![]() |
B.![]() |
C.若该三棱台存在内切球,则![]() |
D.若该三棱台存在外接球,则![]() |
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6 . 在正四棱台
中,
,
,
为棱
的中点,当正四棱台的体积最大时,下列说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/439cf259dd6137aa31bb99244a04ddfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f7e8dd831f4edc711c0f7d5f078f625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
A.该正四棱台的高为2 |
B.该正四棱台的体积为224 |
C.平面![]() ![]() |
D.该正四棱台的内切球半径为1 |
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7 . 已知球O的半径为R,正四棱台ABCD-A1B1C1D1的两底面边长分别为2和4,高为h,则( )
A.对任意h>0,都存在R>0,使点O到该棱台所有面的距离都等于R |
B.对任意h>0,都存在R>0,使该棱台的所有顶点都在球O的球面上 |
C.若点O到该棱台所有面的距离都等于R,则![]() |
D.若该棱台所有顶点都在球O的球面上,且![]() ![]() |
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8 . 正四棱台
中,
,侧棱
与底面所成角为
分别为
,
的中点,
为线段
上一动点(包括端点),则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/10/de89f645-4ff0-4e7d-91b1-751d8faa4d64.png?resizew=200)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71924b6456b561e88b95f885be7601a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a3e99f45a474ed310d49a5e5c7bd0a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a773f779cd892616a4ff68d3715f173.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/10/de89f645-4ff0-4e7d-91b1-751d8faa4d64.png?resizew=200)
A.该四棱台的体积为![]() | B.三棱锥![]() |
C.平面![]() | D.异面直线![]() ![]() ![]() |
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解题方法
9 . 正三棱台
中,
,
分别是
和
的中心,且
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bbcdaa9492b12bf8863b1435d6f8237.png)
A.直线![]() ![]() ![]() |
B.平面![]() ![]() ![]() |
C.正三棱台![]() ![]() |
D.四棱锥![]() ![]() ![]() |
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2023-01-02更新
|
552次组卷
|
4卷引用:海南省昌江县部分学校2023届高三二模数学试题
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10 . 如图是常见的一种灭火器消防箱,抽象成数学模型为如图所示的六面体,其中四边形
和
为直角梯形,A,D,C,B为直角顶点,其他四个面均为矩形,
,
,
,下列说法不正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/537c4a2e-9621-4827-9f49-33209f622cd3.png?resizew=103)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/381f7379-c547-4743-90aa-6336dd9038df.png?resizew=119)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6895631698282a5e8887a09177cc98a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b60c3b75ff1610956dfe9a9cd7692d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c9dcc6eb62da2f6148d935c570b2122.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49941fbf6ade46b04377b7465bae453c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73e0b10b0e45ee1193ab26836bf1ff0b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/537c4a2e-9621-4827-9f49-33209f622cd3.png?resizew=103)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/381f7379-c547-4743-90aa-6336dd9038df.png?resizew=119)
A.该几何体是四棱台 |
B.该几何体是棱柱,平面![]() |
C.![]() |
D.平面![]() ![]() ![]() |
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2022-10-19更新
|
420次组卷
|
7卷引用:2023年高三数学押题密卷五