正六棱锥
的高为
,底面边长为
.
(1)按1∶1画出它的二视图;
(2)求其侧面积;
(3)求它的侧棱和底面的夹角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4a44d3c1d1bfb48ad0d1f28f1da6a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c78d0ab561d0c9bb9099772c596af8bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c78d0ab561d0c9bb9099772c596af8bf.png)
(1)按1∶1画出它的二视图;
(2)求其侧面积;
(3)求它的侧棱和底面的夹角.
更新时间:2022-11-07 15:29:18
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解答题-作图题
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适中
(0.65)
解题方法
【推荐1】如图为一简单组合体,其底面ABCD为正方形,PD⊥平面ABCD,EC//PD,且PD=AD=2EC=2.
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(1)请画出该几何体的三视图;
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(1)请画出该几何体的三视图;
(2)求四棱锥B-CEPD的体积.
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解答题-证明题
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【推荐2】(1)已知
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外的两平行直线,且有
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(2)画出下面实物的三视图.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/1/afbdcf8d-7b28-4fa5-bdab-ca52e8815b88.png?resizew=144)
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解答题-问答题
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适中
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【推荐1】如图,在四棱锥
中,底面
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(1)求线段
的长;
(2)若平面
平面
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,直线
与平面
所成的角为
,
,求三棱锥
的表面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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(1)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
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解答题-问答题
|
适中
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解题方法
【推荐2】如图,已知三棱锥
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3c3f13203c1915b104924f650fe4227.png)
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(1)求点
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(2)求三棱锥
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解答题-证明题
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适中
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【推荐1】如图,在正方体
中,
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(1)求证:
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和平面
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(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307807ee10071bafbe922eb18d2517d7.png)
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名校
【推荐2】如图,三棱锥
中,平面
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,
,
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分别是棱
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/b5b95dfd-5051-4979-bea3-a3df84fa77c7.png?resizew=164)
(1)证明:
平面
;
(2)若
与平面
所成的角为
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(1)证明:
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(2)若
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