如图所示,在直三棱柱
中,
是
的中点.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
平面
;
(2)设
,求几何体
的体积.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bca84ad86c648d3bb20c8909c8da3f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe1d6750e4b38ecfae78c0eed96153b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e9f157d1d7cfb37741825e3e9bcb9c.png)
21-22高一下·辽宁·阶段练习 查看更多[4]
辽宁省六校协作体2021-2022学年高一下学期第三次联合考试数学试题(已下线)第31讲 空间几何体体积及点到面的距离问题4种题型(已下线)8.5.2 直线与平面平行(精练)-【题型分类归纳】2022-2023学年高一数学同步讲与练(人教A版2019必修第二册)陕西省西安中学2022-2023学年高一下学期期中考试数学试题
更新时间:2022-06-20 15:28:57
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(1)在平面直角坐标系中作出原平面图形ABCD并求面积;
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【推荐2】如图所示的几何体,是由棱长为2的正方体
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(1)试画出该几何体的三视图(主视图投影面平行平面
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(2)若截面
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【推荐3】已知一个几何体的三视图如图所示.
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【推荐1】如图,
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(1)证明:
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【推荐2】如图,四棱锥
的底面是正方形,PA⊥平面ABCD,E,F分别为AB,PD的中点,且PA=AD=2.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/30/bcedff8f-a1f1-4902-af77-49b7a141c11d.png?resizew=187)
(1)求证:
平面PEC;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/30/bcedff8f-a1f1-4902-af77-49b7a141c11d.png?resizew=187)
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【推荐3】如图,在五面体
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与平面
所成角的大小为
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