题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070404-33524.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070405-71677.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070405-32016.png)
(1)求几何体
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070405-94496.png)
(2)是否存在点E,使平面
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070405-75722.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070405-52672.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070405-47083.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070405-50381.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070405-88262.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070405-93986.png)
且底面
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070406-28204.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070406-53411.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070406-60318.png)
三棱柱
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070405-50381.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070406-13431.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070406-77190.png)
(Ⅱ)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070406-32183.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070405-50381.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070405-88262.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070405-93986.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070406-75404.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070406-60851.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070407-26386.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070407-16395.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070407-59799.png)
又
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070407-93915.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070407-93151.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070407-72309.png)
由
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070407-26122.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070408-43786.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070408-68751.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070408-59792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070408-57854.png)
又
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070408-52796.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070409-88281.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070409-81379.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070409-24473.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070408-57854.png)
解析
核心考点
试题【一个三棱柱的直观图和三视图如图所示(主视图、俯视图都是矩形,左视图是直角三角形),设为线段上的点.(1)求几何体的体积;(2)是否存在点E,使平面平面,若存在,】;主要考察你对线线角等知识点的理解。[详细]
举一反三
①两条直线都和同一平面平行,则这两条直线平行;
②两条直线没有公共点,则这直线平行;
③两条直线都和第三条直线垂直,则这两条直线平行;
④一条直线和一个平面内无数条直线没有公共点,则这条直线和这个平面平行.
其中正确命题的个数
A.3个 | B.2个 | C.1个 | D.0个 |
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070351-56226.png)
(1)求证:PA∥平面BDE
(2)求证:平面PAC
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070351-56226.png)
(3)若
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070351-39498.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070352-13852.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070352-91494.png)
①一条直线和两条直线平行线中的一条垂直,则它也和另一条垂直;
②空间四点A、B、C、D,若直线AB和直线CD是异面直线,那么直线AC和直线BD也是异面直线;
③空间四点若不在同一个平面内,则其中任意三点不在同一条直线上;
④若一条直线l与平面
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070347-50301.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070347-34003.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070337-67706.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070337-62385.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070337-93756.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070337-52420.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070337-56382.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070337-67706.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070337-56121.png)
(I)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070338-15636.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070337-52420.png)
(II)点
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070338-33253.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070338-59192.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070338-26426.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070338-76354.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070338-92727.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070338-72523.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070338-61968.jpg)
①如果直线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070321-28060.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070321-87864.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070321-28060.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070321-87864.png)
②如果平面
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070321-87864.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070321-37772.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070321-45712.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070322-17494.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070322-16271.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070322-14200.png)
③如果平面
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070321-87864.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070321-37772.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070321-87864.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070321-37772.png)
④如果
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070322-16271.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070322-14200.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070321-87864.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070322-16271.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022070322-14200.png)
其中真命题的个数是:( )
A.3个 | B.2个 |
C.1个 | D.0个 |
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