题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031423-11445.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031423-16500.gif)
(1)求证:平面
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031423-86865.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031424-79440.gif)
(2)求点
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031424-42409.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031424-55128.gif)
(3)求三棱锥
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031424-74478.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031425-99520.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031425-14615.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031425-61289.gif)
解析
核心考点
试题【 (本小题共12分)直四棱柱中,底面是边长为的正方形,侧棱长为4。(1)求证:平面平面;(2)求点到平面的距离d;(3)求三棱锥的体积V。 】;主要考察你对空间几何体的结构特征等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031407-35207.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031407-26864.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031407-79993.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031408-29561.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031408-61494.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031408-59813.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031407-35207.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031408-32027.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031409-20617.jpg)
(Ⅰ)证明:平面
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031409-95871.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031409-68241.gif)
(Ⅱ)如果△
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031409-77780.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031409-44021.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031402-96995.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031403-75728.gif)
① 若
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031403-51790.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031403-26792.gif)
③ 若
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031403-84301.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031404-39592.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031404-78305.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031404-96789.gif)
其中不正确的命题的序号是.(将所有不正确的命题的序号都写上)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031357-48061.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031358-64370.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031358-10043.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031358-41845.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031358-37329.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031359-40018.gif)
(1)有两组对边相等的四边形是平行四边形 (2)四边相等的四边形是菱形
(3)平行于同一条直线的两条直线平行 (4)有两边及其夹角对应相等的两个三角形全等
A. 1 | B. 2 ![]() | C. 3 | D. 4 |
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031344-95288.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031344-87961.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031344-44835.jpg)
(Ⅰ)证明:平面
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031344-23009.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031345-19789.gif)
(Ⅱ)设AB=
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031345-76489.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031344-95288.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031344-87961.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031345-22155.gif)
(i)当点C在圆周上运动时,求
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031345-22155.gif)
(ii)记平面
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031345-55014.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031346-53535.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031346-53107.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031346-50400.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031345-22155.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031346-76569.gif)
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