如图,在Rt△AOB中,AO=OB=2,△AOC通过△AOB以OA为轴顺时针旋转120°得到(∠BOC=120°).点D为斜边AB上一点,点M为线段BC上一点,且CM=OM.
![](https://img.xkw.com/dksih/QBM/2021/6/13/2742311663616000/2742737708294144/STEM/75e0829be0444fa28ff60895ca5480b0.png?resizew=164)
(1)证明:
平面
;
(2)当D为线段AB中点时,求多面体OACMD的体积.
![](https://img.xkw.com/dksih/QBM/2021/6/13/2742311663616000/2742737708294144/STEM/75e0829be0444fa28ff60895ca5480b0.png?resizew=164)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b6e1092115b2d153849de1a20cdd53c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
(2)当D为线段AB中点时,求多面体OACMD的体积.
20-21高一上·江苏·单元测试 查看更多[2]
第14章:几何体中的表面积与体积(B卷提升卷)-2020-2021学年高一数学必修第二册同步单元AB卷(新教材苏教版)(已下线)专题一 点、直线和平面之间的位置关系-2021-2022学年高二数学同步单元AB卷(人教A版2019选择性必修第一册)
更新时间:2021-06-14 11:37:03
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【推荐1】在三棱柱
中,已知
,点
在底面
的射影是线段
的中点
.
点为线段
上的一个动点.
![](https://img.xkw.com/dksih/QBM/2020/12/1/2604907446059008/2641893326118912/STEM/f0e8b3ce0a9842d391cd0ad21ab0cc25.png?resizew=314)
(1)若
平面
,则求出
的长;
(2)求四面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54db4980611d321429658d6ed5b1af53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/2020/12/1/2604907446059008/2641893326118912/STEM/f0e8b3ce0a9842d391cd0ad21ab0cc25.png?resizew=314)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9de7ea432599108b34a0ccaa0f2c75e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
(2)求四面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/920899d8f8baf4e5fc4024ff9832b9b2.png)
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【推荐2】在四棱锥P-ABCD中,底面ABCD是平行四边形,
底面ABCD,PD=AD=1,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/8368dafe-f36d-4599-8f26-8b411388e96f.png?resizew=191)
(1)证明:
;
(2)求D到平面ABP的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06201e4f55b78d8b30afb257d5a1b16b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8cc377ac333f70403bdc8fe84098f55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/8368dafe-f36d-4599-8f26-8b411388e96f.png?resizew=191)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b07e317ffe7859e81b42ef4970e344a.png)
(2)求D到平面ABP的距离.
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【推荐1】如图,在底面是正方形的四棱锥
中,
平面
,
交
于点
,
是
的中点,
为
上一点.
![](https://img.xkw.com/dksih/QBM/2019/6/7/2220514859515904/2220753003741184/STEM/2bf0fa13d57943fcbe909e73bd424533.png?resizew=144)
(1)求证:
;
(2)确定点
在线段
上的位置,使
平面
,并说明理由.
![](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/d40b319212a7e7528b053e1c7097e966.png)
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![](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/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/2019/6/7/2220514859515904/2220753003741184/STEM/2bf0fa13d57943fcbe909e73bd424533.png?resizew=144)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c799d3d37ed64c9c74c0d3d932cd3f3f.png)
(2)确定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a779876cdfb2c489ad0eaed0f73e6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
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【推荐2】如图,在四棱锥
中,
平面ABCD,
,
,
,点E为棱PD的中点.
![](https://img.xkw.com/dksih/QBM/2022/1/13/2893674172907520/2894437432475648/STEM/877b264c-fdca-421d-bed8-d46e3d1263ca.png?resizew=207)
(1)求证:
平面PAB;
(2)求证:
平面PAB.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45fbffb9e2c7fa7c5006cde8da0cabe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e839ac941e8bf536ff35a12e56c7a400.png)
![](https://img.xkw.com/dksih/QBM/2022/1/13/2893674172907520/2894437432475648/STEM/877b264c-fdca-421d-bed8-d46e3d1263ca.png?resizew=207)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58a20ea69475dcf57a5ff18c13eceaaa.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
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