题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045027-75185.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045027-42090.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045027-83209.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045028-90698.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045028-54280.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045028-15464.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045028-29891.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045028-97269.png)
(Ⅰ)求角
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045028-90698.png)
(Ⅱ)求
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045029-22558.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045029-98784.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045029-76095.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045029-27420.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045029-22558.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045030-81879.png)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045028-97269.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045030-67128.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045030-41392.png)
可得
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045030-78792.png)
(II)由于
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045029-76095.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045030-53643.png)
所以令
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045031-35129.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045031-26768.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045022-36970.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045022-79966.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045022-84975.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045022-53861.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045023-96529.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045022-36970.png)
(2) 若
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045023-29941.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045023-97478.png)
要求最容易,应当采用的一组是( )
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045017-23042.jpg)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045014-25264.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045014-37368.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045014-79637.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045015-55105.png)
如图,
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045004-90865.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045004-41941.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045004-95287.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045004-90865.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045004-41941.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045005-66828.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045005-93446.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045005-84866.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045005-40599.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045006-67080.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045006-67382.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045006-82405.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045006-48974.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045004-95287.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045006-27975.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045004-90865.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045007-14185.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045007-66132.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045007-27835.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045004-95287.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045006-67080.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045007-27835.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045006-82405.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045004-90865.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045007-38675.jpg)
请从甲或乙的想法中选出一种测量方法,写出你的选择并按如下要求完成测量计算:①画出测量示意图;②用所叙述的相应字母表示测量数据,画图时
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045005-93446.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045008-80932.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045004-90865.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020045001-20944.png)
A.等腰三角形 | B.直角三角形 |
C.等腰直角三角形 | D.等腰三角形或直角三角形 |
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