如下图1所示,已知正方体面对角线长为
,沿阴影面将它切割成两块,拼成如图2所示的几何体,那么此几何体的表面积为( )
![](https://img.xkw.com/dksih/QBM/2022/5/12/2977926689128448/2980203028258816/STEM/0393dacf-f055-45de-b474-7f65eb0a25bb.png?resizew=303)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827bec361fa9658bc190b57633f2b5aa.png)
![](https://img.xkw.com/dksih/QBM/2022/5/12/2977926689128448/2980203028258816/STEM/0393dacf-f055-45de-b474-7f65eb0a25bb.png?resizew=303)
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更新时间:2022-05-15 23:41:29
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【知识点】 棱柱表面积的有关计算
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解题方法
【推荐1】已知直四棱柱的高为2,其底面四边形ABCD水平放置时的斜二测直观图为矩形
,如图所示.若
,则该直四棱柱的表面积为( )
![](https://img.xkw.com/dksih/QBM/2022/7/6/3016579722805248/3018021668577280/STEM/d67d716a6c7e40498876ac92dfdd6682.png?resizew=180)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d609847e2ff3d64e5a514582c3ead0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d19424359c43dcbd0f28e6dff5d20ab.png)
![](https://img.xkw.com/dksih/QBM/2022/7/6/3016579722805248/3018021668577280/STEM/d67d716a6c7e40498876ac92dfdd6682.png?resizew=180)
A.![]() | B.![]() | C.![]() | D.![]() |
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单选题
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较易
(0.85)
【推荐2】一个几何体的三视图如图所示,则该几何体的表面积是()
![](https://img.xkw.com/dksih/QBM/2017/5/7/1682053811634176/1683338687995904/STEM/23347f7a-5227-4582-9e0a-ea1f39609932.png?resizew=271)
![](https://img.xkw.com/dksih/QBM/2017/5/7/1682053811634176/1683338687995904/STEM/23347f7a-5227-4582-9e0a-ea1f39609932.png?resizew=271)
A.![]() | B.![]() | C.![]() | D.![]() |
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