如图,在三棱柱
中,
,
.
![](https://img.xkw.com/dksih/QBM/2021/2/5/2651506292899840/2652431910764544/STEM/25409eba9f6a4170a928d61d110499dc.png?resizew=131)
(1)若三棱柱
的体积为1,求三棱锥
的体积;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4422feb1d327f5d658b69c2a6329361b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://img.xkw.com/dksih/QBM/2021/2/5/2651506292899840/2652431910764544/STEM/25409eba9f6a4170a928d61d110499dc.png?resizew=131)
(1)若三棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/861d61d2b7b16e12fd97f870fb3fa522.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffeea0a84cdd67bd8bed95bc0f8ae364.png)
20-21高一上·广西河池·期末 查看更多[3]
广西河池市2020-2021学年高一上学期期末数学试题(已下线)8.6空间直线、平面的垂直(1)(精讲)-2020-2021学年高一数学一隅三反系列(人教A版2019必修第二册)广西来宾市2020-2021学年高一上学期期末数学试题
更新时间:2021-02-06 21:29:26
|
相似题推荐
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】如图四棱锥
中,
平面
,
为平行四边形,且
,
,
,
是棱
上的一点,
.
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27db558e8db4c957654c8e5cecd2d2dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/967f74b8993c61634ceed95edca05ffd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a15e9285ea086558910c16a5127ffb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65277734669566578cbb7d690bb200fb.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb7ed85b76fb4c5e9a9a60bff4337742.png)
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解答题-问答题
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【推荐2】如图,在三棱柱
中,
和
均是边长为
的等边三角形,平面
平面
,点
为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/e71815e2-277b-487e-ad28-a732d12af4dd.png?resizew=250)
(1)证明:
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a715009a5804dc935ade37f5ac51591.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0671b4776e142e17a79af5b3f0378ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/e71815e2-277b-487e-ad28-a732d12af4dd.png?resizew=250)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e5981445b6f2a6c58974158d96a4de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9faaa72a643f127fbfe04fb91cd3171.png)
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【推荐1】如图,在平行六面体
中,
,
,
.
![](https://img.xkw.com/dksih/QBM/2018/4/28/1934056140660736/null/STEM/c1d568454f8147d2b567d61777599f7b.png?resizew=134)
(1)证明:
;
(2)若
,
,求多面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd694ad3a4733c7c84aaa7946aeea4de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c029f2663b3fd557c9169e295c353e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50fc221c629a1be1732504c3893b69d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94dedbe13f87fa80cb4df715ae30fdb4.png)
![](https://img.xkw.com/dksih/QBM/2018/4/28/1934056140660736/null/STEM/c1d568454f8147d2b567d61777599f7b.png?resizew=134)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9b4745e448bad64d17afc8073f5f961.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae2515d93aa1dcfb10f7d01e9f1dffd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/801f9c18c253bb5395e213747992ea01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6572c5d31fab0fc5a6105413b1e3dea7.png)
您最近一年使用:0次
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(0.65)
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【推荐2】如图,在四棱锥
中,已知
平面
,且四边形
为直角梯形,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/c681f29e-2ce6-4949-952e-96eada8d932f.png?resizew=190)
(1)求四棱锥
的体积;
(2)若点Q为线段BP的中点,求直线
与平面
所成角的大小(用反三角函数值表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/405effb49ef901476701e72cc47918da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf2e356de1dec9ce998366a1a35c0a9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/c681f29e-2ce6-4949-952e-96eada8d932f.png?resizew=190)
(1)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
(2)若点Q为线段BP的中点,求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5d8073385db872410ca88187bbb0d34.png)
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