已知三棱锥
的底面是正三角形,
点在侧面
上的射影
是
的垂心,二面角
的平面角等于
,
.那么,三棱锥
的体积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21665d21bbfb04410c78345de1fd15ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a4f35cc999ab3274d367a842b79ab7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd99cbecd9a46f99ac4af8e72f11ce59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb9a768239f8efec81d9ef718c585c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
2007高三·全国·竞赛 查看更多[1]
更新时间:2018-12-09 22:39:11
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