题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034313-40144.png)
A.PB⊥AD | B.平面PAB⊥平面PBC |
C.直线BC∥平面PAE | D.直线PD与平面ABC所成的角为45° |
答案
解析
所以A不成立,又,平面PAB⊥平面PAE,
所以平面PAB⊥平面PBC也不成立;BC∥AD∥平面PAD,
∴直线BC∥平面PAE也不成立.
在Rt△PAD中,PA=AD=2AB,∴∠PDA=45°,
故选D.
核心考点
试题【如图,已知六棱锥P-ABCDEF的底面是正六边形,PA⊥平面ABC,PA=2AB,则下列结论正确的是A.PB⊥AD B.平面PAB⊥平面PBCC.直线BC∥】;主要考察你对向量与空间位置关系等知识点的理解。[详细]
举一反三
如图,
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034248-14381.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034248-47864.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034248-55969.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034248-28464.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034248-32600.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034248-42559.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034248-97850.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034248-47758.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034248-66648.png)
(1)证明:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034248-82933.png)
(2)求平面
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034249-42264.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034248-97850.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034249-42679.png)
(1)求正三棱台ABC-A1B1C1的体积;
(2)求平面EA1B1与平面A1B1C1的夹角的余弦;
(3)若P是棱A1C1上一点,求CP+PB1的最小值.
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034238-32829.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034224-78942.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034224-34476.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034225-78310.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034224-34476.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034225-68583.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034225-45285.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034225-50136.png)
(Ⅰ)证明:直线
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034225-85174.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034225-65807.png)
(Ⅱ)求直线
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034226-23441.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034224-34476.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034213-44419.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034213-89118.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034213-88777.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034214-99947.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034214-51675.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034214-81040.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034213-89118.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034214-84927.png)
(Ⅰ)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034214-65557.png)
(Ⅱ)在棱
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034214-37968.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034214-54561.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034215-32774.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034215-66903.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034202-73404.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034202-53556.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034202-45904.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106034203-57430.png)
A.相交 | B.异面 | C.平行 | D.异面或相交 |
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