题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031957-74253.gif)
(1)求证:PC⊥BC
(2)求点A到平面PBC的距离
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031958-64874.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031958-45846.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031958-94421.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031958-45050.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031958-24070.gif)
(2)设点A到平面PBC的距离为
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031958-20927.gif)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031958-24615.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031958-96995.gif)
容易求出
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031958-60816.gif)
解析
核心考点
试题【(14分)如图,四棱锥P-ABCD中,PD⊥平面ABCD,PD=DC=BC=1,AB=2,AB∥DC,∠BCD=900(1)求证:PC⊥BC(2)求点A到平面P】;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
如图,在多面体
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031949-34711.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031950-25690.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031950-23307.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031950-21428.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031950-27531.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031951-24825.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031951-86454.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031951-39261.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031951-14642.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031951-96010.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031952-27307.gif)
(Ⅰ)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031952-79412.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031952-81688.gif)
(Ⅱ)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031952-28304.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031952-81688.gif)
(Ⅲ)求二面角
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031952-28705.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031938-35350.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031938-37648.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031938-24916.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031938-79227.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031938-87098.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031938-24170.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031938-60374.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031939-22158.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031939-98229.gif)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031939-46894.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031939-86675.gif)
(2)求异面直线
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031939-42024.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031939-53119.gif)
(3)求点
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031939-76129.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031939-86675.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031940-78876.jpg)
如图5所示,在正方体
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031929-25981.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031929-24068.jpg)
(Ⅰ)求直线BE的平面
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031930-41010.jpg)
(II)在棱
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031930-44038.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031930-13515.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031930-76942.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031918-52598.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031918-20067.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031918-67740.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031919-47682.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031919-56779.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031919-80536.jpg)
图5
(1)证明:EB⊥FD;
(2)已知点Q,R分别为线段FE,FB上的点,使得
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031919-38810.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031920-63494.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031920-25579.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031902-58717.jpg)
如图,圆柱OO1内有一个三棱柱ABC-A1B1C1,
三棱柱的底面为圆柱底面的内接三角形,且AB是圆O的直径。
(Ⅰ)证明:平面A1ACC1⊥平面B1BCC1;
(Ⅱ)设AB=AA1。在圆柱OO1内随机选取一点,记该点取自于
三棱柱ABC-A1B1C1内的概率为P。
(i) 当点C在圆周上运动时,求P的最大值;
记平面A1ACC1与平面B1OC所成的角为
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031902-53517.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031902-53517.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031902-49554.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031902-53517.gif)
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