如图,正方体
,动点
、
在棱
上,动点
、
分别在棱
、
上,若
,
,
,
(
、
、
、
大于零),则四面体
的体积( )
![](https://img.xkw.com/dksih/QBM/2021/6/21/2747941644640256/2782045187997696/STEM/cf164170-2583-4cf9-a694-f4ddf320c733.png?resizew=248)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5faefe9e85fc525c1a7e8900ac6745c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd15aa2c260dd99696f6a1566ca60fac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8deaab2cefd15d7ddb6414088c9ce87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e6af7c11281ed6ac1bf298d6c6c8b25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1015e00c5dfaa3b204c129c5abc2dcb.png)
![](https://img.xkw.com/dksih/QBM/2021/6/21/2747941644640256/2782045187997696/STEM/cf164170-2583-4cf9-a694-f4ddf320c733.png?resizew=248)
A.与![]() | B.与![]() | C.与![]() | D.与![]() |
更新时间:2021-08-25 11:27:41
|
【知识点】 锥体体积的有关计算
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多选题
|
适中
(0.65)
名校
解题方法
【推荐1】如图,等边三角形
的边长为4,
为边
的中点,
于
.将
沿
翻折至
的位置,连接
.那么在翻折过程中,下列说法当中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/2/3eaa320d-fb24-4803-9013-574f530ac602.png?resizew=194)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa2a83fed9bf4cb09d84a980452e346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/2/3eaa320d-fb24-4803-9013-574f530ac602.png?resizew=194)
A.![]() |
B.四棱锥![]() ![]() |
C.存在某个位置,使![]() |
D.在线段![]() ![]() ![]() ![]() |
您最近一年使用:0次
多选题
|
适中
(0.65)
解题方法
【推荐2】如图,在正方体
中,
,
,
,
分别为
,
,
,
的中点,
为棱
上一点,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/1/f4979c64-e26b-4b43-8592-0df11e910099.png?resizew=176)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/1/f4979c64-e26b-4b43-8592-0df11e910099.png?resizew=176)
A.直线![]() ![]() |
B.直线![]() ![]() ![]() |
C.三棱锥![]() ![]() |
D.存在点![]() ![]() ![]() |
您最近一年使用:0次