名校
解题方法
1 . 如图,将边长为2的正六边形
沿对角线
折起,记二面角
的大小为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
,连接
,
构成多面体
.
平面
;
(2)问当
为何值时,直线
到平面
的距离等于
?
(3)在(2)的条件下,求多面体
的表面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6238a6fb52a9d2e3521ba66ef9a5c247.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8560ca9023cf64637ce1467f338556bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fca9eb9126c7053574c62b897582ad49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94270844f197d524bf1da4f1385befd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3a079cfdcca9acdacecbf08f9f78cc.png)
(2)问当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3a079cfdcca9acdacecbf08f9f78cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
(3)在(2)的条件下,求多面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fca9eb9126c7053574c62b897582ad49.png)
您最近一年使用:0次
2024-06-08更新
|
166次组卷
|
2卷引用:安徽省金榜教育2023-2024学年高一下学期5月阶段性大联考数学试题
名校
解题方法
2 . 已知直三棱柱
中,
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/12/7/2867393608392704/2868877442506752/STEM/2dbb6858e68946e48247a7cc5cf2d1ec.png?resizew=132)
![](https://img.xkw.com/dksih/QBM/2021/12/7/2867393608392704/2868877442506752/STEM/7c2832dd27a5462f951b507436e5590f.png?resizew=223)
(1)若
为
的中点,证明:
平面
;
(2)将两块形状与该直三棱柱完全相同的木料按如图所示两种方案沿阴影面进行分割,把木料一分为二,留下体积较大的一块木料.根据你所学的知识,请判断采用哪一种方案会使留下的木料表面积较大,并求出这个较大的表面积和说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/883fc5e3faf39829d60804b59deb1730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d6baf49925a5bcb359b542d45067c81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://img.xkw.com/dksih/QBM/2021/12/7/2867393608392704/2868877442506752/STEM/2dbb6858e68946e48247a7cc5cf2d1ec.png?resizew=132)
![](https://img.xkw.com/dksih/QBM/2021/12/7/2867393608392704/2868877442506752/STEM/7c2832dd27a5462f951b507436e5590f.png?resizew=223)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/547a4b438e2e6687c7cd55ea08bbaae2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0afb7e8ef610cb5588bd52755399921a.png)
(2)将两块形状与该直三棱柱完全相同的木料按如图所示两种方案沿阴影面进行分割,把木料一分为二,留下体积较大的一块木料.根据你所学的知识,请判断采用哪一种方案会使留下的木料表面积较大,并求出这个较大的表面积和说明理由.
您最近一年使用:0次
名校
解题方法
3 . 已知长方体
中,
,点
为线段
的中点.
![](https://img.xkw.com/dksih/QBM/2020/12/23/2620466755870720/2623358836056064/STEM/20f492a1-c302-4ff0-a97d-481efecf06fb.png)
(1)若点
在直线
上运动,求证:
;
(2)如图所示,若
,求多面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76e44924029eade339e7e5f8af499ad4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://img.xkw.com/dksih/QBM/2020/12/23/2620466755870720/2623358836056064/STEM/20f492a1-c302-4ff0-a97d-481efecf06fb.png)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5cc20109a6aa69219b1f58cea5182db.png)
(2)如图所示,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b046cc9fd06e3a24f4b99c3ab14a98d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9340ff2654b3db87bee2a74df881415.png)
您最近一年使用:0次
2020-12-27更新
|
150次组卷
|
3卷引用:江西省鹰潭市第一中学2021届高三上学期第四次月考数学(文)试题