如图,正三棱柱
的各条棱长均为
,
、
、
分别是
、
、
的中点。
(1)请在图中作出过
且平行于平面
的一个截面,并说明理由;
(2)求所作截面图形的面积。
![](https://img.xkw.com/dksih/QBM/2010/4/29/1569709163315200/1569709168205824/STEM/c8f09195c8554b3792d244bcda0e2680.png?resizew=129)
![](https://img.xkw.com/dksih/QBM/2010/4/29/1569709163315200/1569709168205824/STEM/324d8ab86be846a49f2f2fa23791cc5f.png?resizew=96)
![](https://img.xkw.com/dksih/QBM/2010/4/29/1569709163315200/1569709168205824/STEM/48b26ff0a863485a940398b77cef4e5e.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2010/4/29/1569709163315200/1569709168205824/STEM/4c477a0678a1471f8df3ed99e9e25c5a.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2010/4/29/1569709163315200/1569709168205824/STEM/f09a8636ea2d4c3495cdfb54755eeaef.png?resizew=17)
![](https://img.xkw.com/dksih/QBM/2010/4/29/1569709163315200/1569709168205824/STEM/15a086e043a3423b855e3390d2c121c6.png?resizew=17)
![](https://img.xkw.com/dksih/QBM/2010/4/29/1569709163315200/1569709168205824/STEM/63f1c0f6849e4f389821a035aaae353f.png?resizew=28)
![](https://img.xkw.com/dksih/QBM/2010/4/29/1569709163315200/1569709168205824/STEM/f7c6ddebd0e5441db61b6a7d838f2b32.png?resizew=26)
![](https://img.xkw.com/dksih/QBM/2010/4/29/1569709163315200/1569709168205824/STEM/a93fe5e89fa94f67ba0b7af232429616.png?resizew=28)
(1)请在图中作出过
![](https://img.xkw.com/dksih/QBM/2010/4/29/1569709163315200/1569709168205824/STEM/e8f2ea3f8f1247eb85311a70b491d30b.png?resizew=26)
![](https://img.xkw.com/dksih/QBM/2010/4/29/1569709163315200/1569709168205824/STEM/907a142bb69849ec99c28657184a1659.png?resizew=37)
(2)求所作截面图形的面积。
![](https://img.xkw.com/dksih/QBM/2010/4/29/1569709163315200/1569709168205824/STEM/c8f09195c8554b3792d244bcda0e2680.png?resizew=129)
9-10高二下·四川绵阳·期中 查看更多[2]
更新时间:2019-01-30 18:14:09
|
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