题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223606-23150.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223606-39290.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223607-95665.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223607-13858.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223607-61844.png)
(1)若直线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223607-31990.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223608-44563.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223607-61844.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223607-31990.png)
(2)对于线段
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223608-23217.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223608-82724.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223608-44563.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223608-87650.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223609-79096.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223609-19095.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223609-54462.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223609-75954.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223609-85059.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223610-66390.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223610-58900.png)
解析
试题分析:(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223610-32144.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223611-91626.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223609-79096.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223608-87650.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223611-10272.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223608-23217.png)
试题解析:(1)线段
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223611-23889.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223611-40503.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223612-51748.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223612-57235.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223612-22997.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223612-70420.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223607-61844.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223613-99583.png)
设圆心
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223613-30335.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223613-37986.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223613-72920.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223613-37986.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223607-61844.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223614-99064.png)
当直线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223613-37986.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223614-51136.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223609-85059.png)
当直线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223613-37986.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223614-51136.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223614-12210.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223614-94730.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223615-54994.png)
综上,直线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223613-37986.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223609-85059.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223610-66390.png)
(2) 直线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223615-64055.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223615-26720.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223615-89558.png)
因为点
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223609-79096.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223608-82724.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223615-77272.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223616-99444.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223608-87650.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223609-75954.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223609-54462.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223616-77208.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223616-56368.png)
因为该关于
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223616-18540.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223617-31670.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223609-75954.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223617-32323.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223617-93599.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223617-88061.png)
又
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223618-81224.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223618-25744.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223618-79687.png)
而
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223618-81497.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223618-39633.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223619-20191.png)
又线段
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223615-64055.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223619-33245.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223619-86868.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223618-79687.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223619-33189.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223609-54462.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223609-75954.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223610-58900.png)
核心考点
试题【已知的三个顶点,,,其外接圆为.(1)若直线过点,且被截得的弦长为2,求直线的方程;(2)对于线段上的任意一点,若在以为圆心的圆上都存在不同的两点,使得点是线段】;主要考察你对点到直线的距离等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223600-44276.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223600-90490.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223601-74577.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223601-12165.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223601-95088.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223601-42709.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223554-75327.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223554-53691.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223554-20881.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223555-19040.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223555-21088.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223545-70429.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223546-99100.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223546-67702.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223546-31124.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223546-85031.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223546-45541.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223533-23374.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223533-43713.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223534-57453.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223534-94312.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223534-21743.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223530-36111.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022223530-19973.png)
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