如图,在四棱锥
中,
平面
,底面
是平行四边形,
,则此几何体的侧视图的面积是( )
![](https://img.xkw.com/dksih/QBM/2022/9/27/3075376927301632/3075432442470400/STEM/694c5ce583dc44739cbeeccacca33cb0.png?resizew=226)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/910eb3d1ddb69c093788c63b54956678.png)
![](https://img.xkw.com/dksih/QBM/2022/9/27/3075376927301632/3075432442470400/STEM/694c5ce583dc44739cbeeccacca33cb0.png?resizew=226)
A.![]() | B.1 | C.![]() | D.![]() |
2023高三·全国·专题练习 查看更多[1]
(已下线)考向25空间几何体的结构、三视图和直观图(重点)
更新时间:2022-09-28 23:26:44
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【推荐1】如图1,边长为2的正方形ABCD中,E、F分别是AB、BC的中点,将△ADE, △CDF, △BEF折起,使A,C,B三点重合于G,所得三棱锥G-DEF的俯视图如图2,则该三棱锥正视图的面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/ff52f783-5be9-48b4-90aa-db0b2e3043cf.png?resizew=199)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/ff52f783-5be9-48b4-90aa-db0b2e3043cf.png?resizew=199)
A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐2】如图所示几何体的正视图和侧视图都正确的是( )
![](https://img.xkw.com/dksih/QBM/2022/1/12/2892742264774656/2943082556751872/STEM/df0e8d71f4164ad0b9beaa1ee3d7d3ad.png?resizew=156)
![](https://img.xkw.com/dksih/QBM/2022/1/12/2892742264774656/2943082556751872/STEM/df0e8d71f4164ad0b9beaa1ee3d7d3ad.png?resizew=156)
A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐1】如图,在四棱锥PABCD中,底面ABCD为矩形,平面PAD⊥平面ABCD,则下列说法中错误的是( )
A.平面PAB⊥平面PAD |
B.平面PAD⊥平面PDC |
C.AB⊥PD |
D.平面PAD⊥平面PBC |
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【推荐2】如图,在直三棱柱
中,
为
上一点,平面
分三棱柱为上下体积相等的两部分,则
与
所成角的余弦值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/7/9f163cb6-5e74-4046-a45a-11d1afd9a42c.png?resizew=173)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2a4ff389266ae1136087ef711ca48dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db3ef97d64e58d311019b70fe5e2cc0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/7/9f163cb6-5e74-4046-a45a-11d1afd9a42c.png?resizew=173)
A.![]() | B.![]() | C.![]() | D.![]() |
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