如图所示,在四棱锥P-ABCD中,PA⊥平面ABCD,底面ABCD是矩形,
,
,过点B作BE⊥AC,交AD于点E,点F,G分别为线段PD,DC的中点.
![](https://img.xkw.com/dksih/QBM/2022/3/8/2931669833605120/2932329304940544/STEM/a4b4e379991842a39b6b6325331ca4f6.png?resizew=152)
(1)证明:AC⊥平面BEF;
(2)求三棱锥F-BGE的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f235e99b0b55ac252c4b18cc315dc114.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://img.xkw.com/dksih/QBM/2022/3/8/2931669833605120/2932329304940544/STEM/a4b4e379991842a39b6b6325331ca4f6.png?resizew=152)
(1)证明:AC⊥平面BEF;
(2)求三棱锥F-BGE的体积.
更新时间:2022-03-09 08:22:09
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【推荐2】已知四棱锥
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(1)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
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【推荐1】如图,四棱锥
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(2)若点E是侧棱PB中点,平面ADE与平面PAD所成的二面角为60°,请求出四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
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【推荐2】如图,在斜边为AB的Rt△ABC,过A作PA⊥平面ABC,AE⊥PB于E,AF⊥PC于F.
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