解题方法
1 . 在正三棱锥
中,
,
,顶点
在底面
内的射影为
,点
、
分别是棱
、
的中点,则下列说法错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb9a768239f8efec81d9ef718c585c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
A.![]() | B.![]() | C.![]() ![]() | D.![]() |
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2 . 已知图1是棱长为1的正六边形
,将其沿直线
折叠成如图2的空间图形
,其中
,则空间几何体
的体积为( )
![](https://img.xkw.com/dksih/QBM/2021/9/9/2804268092055552/2807781895364608/STEM/3e87f9ae-a2fe-4245-a6ec-436f6b5549fb.png?resizew=413)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/795e01bc6a8af7db1813cc15c6717e71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59ccaab17dd782e864556493e852ed1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/795e01bc6a8af7db1813cc15c6717e71.png)
![](https://img.xkw.com/dksih/QBM/2021/9/9/2804268092055552/2807781895364608/STEM/3e87f9ae-a2fe-4245-a6ec-436f6b5549fb.png?resizew=413)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-09-14更新
|
1414次组卷
|
8卷引用:广东省广州市白云区、海珠区2020-2021学年高一下学期期末数学试题
广东省广州市白云区、海珠区2020-2021学年高一下学期期末数学试题浙江省宁波市咸祥中学2021-2022学年高一下学期期末数学试题(已下线)第九章 立体几何专练3—简单几何体的表面积与体积1-2022届高三数学一轮复习四川省内江市第六中学2021-2022学年高三上学期第二次(9月)月考理科数学试卷(已下线)第八章 立体几何初步 章末测试(基础)-2021-2022学年高一数学一隅三反系列(人教A版2019必修第二册)四川省成都市简阳市阳安中学2022-2023学年高一下学期6月月考数学试题4.4平面与平面的位置关系(已下线)期末专题04 立体几何小题综合-【备战期末必刷真题】
名校
解题方法
3 . 在直三棱柱
中,
是
中点.
,
,
,
.则下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/ee611973-4129-49e3-a3d5-6b04b85ca6f1.png?resizew=127)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51d0fdc5a00ca0e857b89a7e1420df29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e60250139e00fae15208a3e0311ce0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/ee611973-4129-49e3-a3d5-6b04b85ca6f1.png?resizew=127)
A.点![]() ![]() ![]() |
B.异面直线![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() ![]() |
D.过![]() ![]() ![]() |
您最近一年使用:0次
2021-08-01更新
|
325次组卷
|
2卷引用:湖南省湘西自治州2020-2021学年高一下学期期末数学试题