如图,正三棱柱
的各棱长均为2,D为棱BC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/000f4cbb-e0cd-46d0-9733-f668f659309d.png?resizew=149)
求该三棱柱的表面积;
求异面直线AB与
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80969d2b85b57d776a482dde2df0f5a6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/000f4cbb-e0cd-46d0-9733-f668f659309d.png?resizew=149)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb151d59de09ea1974e80c13999eb208.png)
19-20高三上·上海闵行·期末 查看更多[2]
更新时间:2019-03-18 09:52:59
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相似题推荐
解答题-证明题
|
容易
(0.94)
名校
解题方法
【推荐1】如图,在三棱柱
中,侧棱
底面
,
,
为
的中点,
,
.
的表面积;
(2)求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4339a40ae9d1947ec3a4b3e2fa3a16cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aff368051d372bc2394f3a95a0c4ebca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a935b7d21a103a264b6e96ecf82dbe4a.png)
您最近一年使用:0次
【推荐2】在正三棱柱
中,已知它的底面边长为2.
(1)若该正三棱柱的高为4,分别求其表面积与体积.
(2)若直线
与平面
所成角的大小为
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
(1)若该正三棱柱的高为4,分别求其表面积与体积.
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc795fa81b568ee1310a177ac222ee3.png)
您最近一年使用:0次
解答题-问答题
|
容易
(0.94)
解题方法
【推荐1】如图,在正方体ABCD-A1B1C1D1中,DA=DC=DD1=2,求异面直线A1B与B1C所成角的余弦值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/54857034-2414-443b-a86a-c87499647af9.png?resizew=176)
您最近一年使用:0次
解答题-证明题
|
容易
(0.94)
【推荐2】在正方体
中,
为棱
的中点,
为棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/c0356ddd-aa19-4900-aae8-a3a94d149457.png?resizew=177)
(1)求证:
四点共面;
(2)求异面直线
与
所成角的大小.
![](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/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fbafedc202bd0d86c4dfdece9f8f4fe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/c0356ddd-aa19-4900-aae8-a3a94d149457.png?resizew=177)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd2fa1ef673b60ded600583f06d86133.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c09eec4e14a861af83d7828797d176.png)
您最近一年使用:0次