如图,四棱锥
中,
底面
,底面
是正方形,且
=
.
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572677790146560/1572677795946496/STEM/0dc3f32b301347aebc0ea2c319202d2d.png?resizew=171)
(1)求
的长;
(2)求四棱锥
的表面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.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/71d05cabe8b2ed458352638ef291ab45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572677790146560/1572677795946496/STEM/0dc3f32b301347aebc0ea2c319202d2d.png?resizew=171)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
(2)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
更新时间:2016-12-04 08:44:04
|
相似题推荐
【推荐1】如图,正三棱锥(底面是正三角形,侧棱长都相等)
的底面边长为2,侧棱长为3.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/98fd992c-9188-4189-a276-291f04b41e51.png?resizew=155)
(1)求正三棱锥
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(2)求正三棱锥
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/98fd992c-9188-4189-a276-291f04b41e51.png?resizew=155)
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您最近一年使用:0次
【推荐2】已知在正方体
中,截下一个四棱锥E-ABCD,
,E为棱
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/c7ee8d0a-239d-4f6f-a980-1c70ce7a96a8.png?resizew=157)
(1)求四棱锥E-ABCD的表面积;
(2)求四棱锥E-ABCD的体积与剩余部分的体积之比;
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/c7ee8d0a-239d-4f6f-a980-1c70ce7a96a8.png?resizew=157)
(1)求四棱锥E-ABCD的表面积;
(2)求四棱锥E-ABCD的体积与剩余部分的体积之比;
(3)若点F是AB上的中点,求三棱锥C-DEF的体积.
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
解题方法
【推荐1】如图,
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,
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deeb2b65014a00e15896b45a20d97965.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8ef58be8708144272538ee427fb92c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3bbe4cdd2c154bd9a8073b0d4cecb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307d38cc7012c328f1f22aa793fe76d7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/11/53d3382b-f5df-415a-a003-adb72cc54b43.png?resizew=156)
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解答题-问答题
|
较易
(0.85)
解题方法
【推荐2】如图,四棱锥
中,底面ABCD为矩形,
平面ABCD,
,E、F分别为AD、SC的中点,且
平面SBC.
![](https://img.xkw.com/dksih/QBM/2022/4/19/2961692085477376/2963202800328704/STEM/3e5e23d1f64e4ce7831d695cdd3c9446.png?resizew=253)
(1)求AB;
(2)若
,求点E到平面SCD的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c83f8945042b9c8fb2fbdac9308d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1804c3641953c30ccf750504eff6577.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
![](https://img.xkw.com/dksih/QBM/2022/4/19/2961692085477376/2963202800328704/STEM/3e5e23d1f64e4ce7831d695cdd3c9446.png?resizew=253)
(1)求AB;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cde654b8bf0fb3f49acb19a8f4a1e48f.png)
您最近一年使用:0次