题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011926-93594.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011926-42533.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011927-34494.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011926-42533.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011927-23999.jpg)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011927-44356.gif)
(2)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011927-69921.gif)
(3)若AB是
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011926-42533.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011927-13596.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011927-64403.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011928-48651.gif)
∵ 四边形AFBC内接与圆,∴
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011928-87672.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011928-34893.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011927-44356.gif)
(2) ∵
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011928-90844.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011928-56317.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011929-26564.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011929-50242.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011929-18286.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011927-69921.gif)
(3) AB是
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011926-42533.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011929-74117.gif)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011927-13596.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011930-64709.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011930-95574.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011930-69769.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011930-85811.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011930-70699.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011931-82702.gif)
解析
核心考点
试题【如图所示,已知是的外角的平分线,交BC的延长线于点D,延长DA交的外接圆于点F,连接FB,FC(1)求证:. (2)求证:. (3)若AB是外接圆的直径,,BC】;主要考察你对圆锥曲线性质探讨等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011922-86748.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011922-92871.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011922-71400.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011923-57263.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011923-61021.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011923-93300.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011923-30066.png)
A.0 B.1 C.2 D.3
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011914-42776.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011914-26697.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011915-42645.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011914-42776.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011914-26697.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011915-47618.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011914-42776.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011915-48429.png)
A.
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011915-76542.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011915-88081.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011916-28077.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011915-88081.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011916-29003.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011915-88081.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011915-88081.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011908-33397.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011908-46441.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011908-33397.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011908-24523.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011908-61312.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011908-80870.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011908-33397.png)
A.4 B.
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011909-30047.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011909-59716.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011858-85763.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011858-81826.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011858-43756.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011859-66523.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011859-49921.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011859-73583.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011859-93294.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011900-30974.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011900-69189.png)
A.
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011900-77133.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011900-38519.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011900-50720.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108011901-92155.png)
A.2 B.3 C.4 D.5
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