题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030143-46878.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030143-87215.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030144-49626.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030144-34582.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030144-34648.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030144-94412.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030145-64869.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030145-75837.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030145-26946.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030145-68033.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030145-16316.png)
(1)求角
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030144-49626.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030146-82595.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030146-56950.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030144-34582.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030146-59281.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030146-13433.png)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030145-68033.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030145-16316.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030146-61494.png)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030147-69074.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030147-42815.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030147-56336.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030146-59281.png)
(2)因
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030147-26493.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030148-96884.png)
故
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030148-14789.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030148-60515.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030146-13433.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030135-13042.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030135-55053.png)
(1)求角A与角B的大小;
(2)若BC边上的中线AM的长为
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030135-88413.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030130-71489.png)
A.等边三角形 | B.直角三角形 | C.钝角三角形 | D.锐角三角形 |
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030123-86507.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030124-95146.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030124-21811.png)
①若
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030124-86515.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030124-87485.png)
②若
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030124-35916.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030123-86507.png)
③必存在
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030124-95146.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030124-50587.png)
④若
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030124-96973.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030123-86507.png)
其中,结论正确的编号为 (写出所有正确结论的编号).
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030114-69012.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030114-65195.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030114-26649.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030108-54933.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030108-56630.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030108-68957.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030108-34244.png)
A.![]() ![]() | B.![]() ![]() | C.![]() | D.![]() |
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