9-10高三·安徽蚌埠·阶段练习
解题方法
1 . AB为圆O的直径,点E、F在圆上,AB//EF,矩形ABCD所在平面与圆O所在平面互相垂直,已知AB=2,BC=EF=1.
![](https://img.xkw.com/dksih/QBM/2013/5/29/1571232711491584/1571232716922880/STEM/393605fc39844539be9107f9ef41cdcc.png?resizew=150)
(I)求证:BF⊥平面DAF;
(II)求ABCD与平面CDEF所成锐二面角的某三角函数值;
(III)求多面体ABCDFE的体积.
![](https://img.xkw.com/dksih/QBM/2013/5/29/1571232711491584/1571232716922880/STEM/393605fc39844539be9107f9ef41cdcc.png?resizew=150)
(I)求证:BF⊥平面DAF;
(II)求ABCD与平面CDEF所成锐二面角的某三角函数值;
(III)求多面体ABCDFE的体积.
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2 . 如图所示,正方体
的棱长为
,线段
上有两个动点
且
=
,则下列结论中错误的是( ).
![](https://img.xkw.com/dksih/QBM/2016/6/30/1572850636652544/1572850642518016/STEM/fdb792687ad542cf872286146aebb4b9.png)
![](https://img.xkw.com/dksih/QBM/2016/6/30/1572850636652544/1572850642518016/STEM/cf60c872d9a84932b8c0c430db3336bb.png)
![](https://img.xkw.com/dksih/QBM/2016/6/30/1572850636652544/1572850642518016/STEM/917a2b033fa846bdbc57e47b38e71c05.png)
![](https://img.xkw.com/dksih/QBM/2016/6/30/1572850636652544/1572850642518016/STEM/87023f8b296a4abfb287cb202143a36e.png)
![](https://img.xkw.com/dksih/QBM/2016/6/30/1572850636652544/1572850642518016/STEM/225b3a7a1a124082bcbb2a20a6b4a63c.png)
![](https://img.xkw.com/dksih/QBM/2016/6/30/1572850636652544/1572850642518016/STEM/6e7a6f560afa4e4abd68a761ab7f3a60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://img.xkw.com/dksih/QBM/2016/6/30/1572850636652544/1572850642518016/STEM/fdb792687ad542cf872286146aebb4b9.png)
A.![]() |
B.![]() ![]() |
C.三棱锥![]() |
D.异面直线![]() |
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3 . 如图所示,已知四边形ABCD是菱形,
平面ABCD,PA=AB=BD=2,AC与BD交于E点,F是PD的中点.
(1)求证:PB//平面AFC;
(2)求多面体PABCF的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
(1)求证:PB//平面AFC;
(2)求多面体PABCF的体积.
![](https://img.xkw.com/dksih/QBM/2012/2/15/1570738595028992/1570738600591360/STEM/8d473627104c4a87bafbd7ce8abba82f.png?resizew=164)
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11-12高二·安徽安庆·阶段练习
4 . 一个长、宽、高分别为a、b、c长方体的体积是8cm2,它的全面积是32 cm2, 且满足 b2=ac,求这个长方体所有棱长之和.
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5 . 如图,在三棱柱
中,正方形
的棱长为2,
,点M为AB中点,
.
为直三棱柱;
(2)求直线
与平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c645d1dea7ca8a6eb931635dcf63d6f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4149c3692068ea18563a4ef56d9d1cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19ef601ca1f9c4c031adab4ffed297f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e363082228a653eb5b0dbc3c6161a9c9.png)
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6 . 正方体
的棱长为
是线段
上的动点.
平面
;
(2)
与平面
所成的角的正弦值为
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc79c14b2ed75664547ddd8ba5b1be9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9578aee1ffa7a74c04debf1679b068d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9539f8fb13345b449274b67bbda995db.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24006d28116bc097933cc90bcc0ea69f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9539f8fb13345b449274b67bbda995db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
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7 . 如图,四棱锥
中,底面四边形
为菱形,
.
![](https://img.xkw.com/dksih/QBM/2017/1/26/1619481740525568/1619481741000704/STEM/901ec879f70c474a964c38284a318b9c.png)
(Ⅰ)求证:
;
(Ⅱ)若
,
,求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f5013e91690ac72a947313eb252769f.png)
![](https://img.xkw.com/dksih/QBM/2017/1/26/1619481740525568/1619481741000704/STEM/901ec879f70c474a964c38284a318b9c.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2ccdd87b7ea0667fb405c305c6a497a.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a0367c3fe3c5c5dfefec87f641bbde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c013bbe1fb6e9acf461548b5cf6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
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10-11高二下·安徽宿州·阶段练习
8 . 已知边长为
的空间四边形
的顶点都在同一个球面上,若
,二面角
的余弦值为
,求该球的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb8fb552b9e21dbaba74d11aa747790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f1854ba6cc92481d7a616bd2788a47e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f30d314a642667fef559032264647366.png)
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解题方法
9 . 如图,在正方体
中,棱长为
,
是线段
的中点,设过点
、
、
的平面
与棱
交于点
.
截正方体所得的截面,并求截面多边形的面积;
(2)平面
截正方体,把正方体分为两部分,求比较小的部分与比较大的部分的体积的比值.(参考公式:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(2)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f39602ed1cb0a91908f2de9bcbd35797.png)
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解题方法
10 . 在直三棱柱
中,
.
(1)若
外接圆的半径是1,求直三棱柱
的表面积;
(2)若直三棱柱
外接球的体积是
,求此直三棱柱的高.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/553cec11e0990fa5be4a726e4e0cd45d.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
(2)若直三棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0633b1014080059b7421037c3512cac2.png)
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