名校
解题方法
1 . 如图,菱形
的边长为6,
.将菱形
沿对角线
折起,得到三棱锥
,点
是棱
的中点,
.
![](https://img.xkw.com/dksih/QBM/2015/10/10/1572255726927872/1572255732654080/STEM/b0f2f60b-5775-4850-a0cc-669038aa5c9e.png?resizew=568)
(1)求证:
面
;
(2)求
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebdaa717e140f0085e484c8c42efdb25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c41ffdaecfb3c73d403179e5745c71a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36552f4ac365373c91949981301a8d8e.png)
![](https://img.xkw.com/dksih/QBM/2015/10/10/1572255726927872/1572255732654080/STEM/b0f2f60b-5775-4850-a0cc-669038aa5c9e.png?resizew=568)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02cbddc9b1f36e2cabd9a6c830d14736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
您最近一年使用:0次
2016-12-03更新
|
1161次组卷
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4卷引用:湖南师范大学附属中学2017-2018学年高二上学期期中数学(文)试题
2 . 已知某几何体的三视图如下,根据图中标出的尺寸(单位:cm),可得这个几何体的体积是
![](https://img.xkw.com/dksih/QBM/2016/1/7/1572423728234496/1572423733280768/STEM/fffe14adaff241d28c540ce6c61255b3.png)
![](https://img.xkw.com/dksih/QBM/2016/1/7/1572423728234496/1572423733280768/STEM/fffe14adaff241d28c540ce6c61255b3.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2016-12-03更新
|
433次组卷
|
3卷引用:2016-2017学年湖南省醴陵二中、醴陵四中高二下学期期中联考数学(文)试卷