如图①,正方体
的棱长为
,
为线段
的中点,
为线段
上的动点,过点
、
、
的平面截该正方体所得的截面记为
.
(1)若
,请在图①中作出截面
(保留尺规作图痕迹);
(2)若
(如图②),试求截面
将正方体分割所成的上半部分的体积
与下半部分的体积
之比.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/16/22ae1e89-8db5-4ea6-8da3-f6dcb7e06cb4.png?resizew=358)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db99b838b71c9314a5910a1e28481f66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa858b7c23b77ab2647e01ae4ad57fb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4764374bd2fb78e59cd0b283637baeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63055a5d6916f99d07fede49120753f.png)
20-21高一下·福建漳州·期中 查看更多[5]
福建省漳州第一中学2020-2021学年高一下学期期中考试数学试题(已下线)8.4空间点、直线、平面之间的位置关系B卷(已下线)高一数学下学期期中精选50题(提升版)-2021-2022学年高一数学考试满分全攻略(人教A版2019必修第二册)(原卷版)(已下线)重难点突破03 立体几何中的截面问题(八大题型)(已下线)第二章 立体几何中的计算 专题五 空间几何体截面问题 微点2 空间几何体截面问题(二)【基础版】
更新时间:2021-09-07 09:17:54
|
相似题推荐
解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】如图,在四棱锥
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810ee7bc82b6f452afb3fc18691abc3b.png)
,平面
平面
,平面
平面
.
是
的中点,求证:
平面
;
(2)若
,求三棱锥
体积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810ee7bc82b6f452afb3fc18691abc3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8abf9bd289a356791f94739c3703e11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31c34b18525831f3eda7bb90be0199b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57b65eba072836cd6ecb297c37e87805.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c10c16d2d9d22c4b34ddd965e26aa0d7.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
解题方法
【推荐2】如图1所示,
是水平放置的矩形,
,
.如图2所示,将
沿矩形的对角线
向上翻折,使得平面
平面
.
的体积
;
(2)试判断与证明以下两个问题:
① 在平面
上是否存在经过点
的直线
,使得
?
② 在平面
上是否存在经过点
的直线
,使得
?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
(2)试判断与证明以下两个问题:
① 在平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f49b2f51d88feb313b735e8077117abb.png)
② 在平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0bcc3c5b41a01362779683f5b70710c.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
解题方法
【推荐1】如图,已知正方体
的棱长为1,
分别是线段
上靠近
的三等分点.过点
作该正方体的截面,试求截面图形的周长和面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d689fcd45b3d2fb7627ce2051b628616.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b1bb7cb7f269ff782cc9dd01fba4e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a9c254087893591862787406e45c3da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee031bc1083a2d3c3a350f93503919c4.png)
您最近一年使用:0次
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名校
【推荐2】已知正三棱柱的所有棱长都是1
![](https://img.xkw.com/dksih/QBM/2021/11/17/2853252759158784/2854910084849664/STEM/bba53a56-b3b4-493e-9f35-a53d4a156d97.png?resizew=333)
(1)画经过ABC三点的截面
(2)过棱BC作和底面成
二面角的截面,求此截面面积.
![](https://img.xkw.com/dksih/QBM/2021/11/17/2853252759158784/2854910084849664/STEM/bba53a56-b3b4-493e-9f35-a53d4a156d97.png?resizew=333)
(1)画经过ABC三点的截面
(2)过棱BC作和底面成
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
您最近一年使用:0次