题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004540-69756.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004540-61647.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004540-91857.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004541-33991.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004541-18313.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004541-31903.png)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004541-91179.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004542-42769.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004542-12962.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004542-16586.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004543-68998.png)
解析
试题分析:(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004543-64180.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004543-59434.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004544-53725.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004544-93251.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004543-68998.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004544-30879.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004544-58555.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004545-29678.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004545-72314.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004545-88640.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004545-25695.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004546-79325.png)
点评:此类问题要求学生熟练掌握考纲要求的几个定理如射影定理、圆周角定理、相交弦定理、圆内接四边形的性质定理与判定定理、切割线定理等.
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004531-52933.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004531-55343.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004531-78047.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004532-55752.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004532-10710.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004532-89678.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004533-77277.jpg)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004533-85803.png)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004533-59286.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004531-55343.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004525-36426.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004525-51434.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004525-51434.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004525-40084.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004525-96017.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004525-17010.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004525-65561.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004526-54306.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004512-27619.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004512-83758.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004512-27619.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004512-94924.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004513-61640.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004512-94924.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004513-40604.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004513-62718.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004514-87628.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004514-40664.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004514-98759.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004512-27619.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004514-68508.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004515-52958.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004512-27619.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004515-82839.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004515-50769.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004515-91523.png)
(1)求证:△
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004516-80726.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004516-85608.png)
(2)求证:四边形
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004516-53345.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004503-84927.png)
(1)求∠ADF的度数; (2)若AB=AC,求
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004504-86151.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004457-55366.png)
⑴证明:圆心O在直线AD上;
⑵证明:点C是线段GD的中点.
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