某四面体的三视图如图所示,则该四面体的体积为____________ .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/5a67889a-6634-4b9d-a223-99acc9559c80.png?resizew=201)
更新时间:2019-12-24 13:21:07
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【推荐1】一个四棱锥的三视图如图所示,其中侧视图是斜边为
的等腰直角三角形,正视图是等边三角形,则该四棱锥的最长棱长为___ .
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【推荐2】如图是一个几何体的三视图,则这个几何体的体积为__________ .
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【推荐1】已知
分别是正四面体的棱
上的点,且
,若
,
,则四面体
的体积是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/741204da92e66cc93142b36b5d5e7a79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf78fe37bbb3ea8d0075144514441aee.png)
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【推荐2】如图,在三棱锥
中,平面
平面
,
,
为
的中点.若△
是边长为1的等边三角形,点
在棱
上,
,且二面角
的大小为
,则三棱锥
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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