如图,
中,
,
是外角
的角平分线.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/16/13956124-eb65-4ea1-b555-0eac5c2d8c95.png?resizew=161)
(1)填空:若
,则
;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721c75fcd58d3d54260aad0f82e09e37.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/16/13956124-eb65-4ea1-b555-0eac5c2d8c95.png?resizew=161)
(1)填空:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff984f9c4321f6359f1d21ec13a34355.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afde09d82ae96f00c135732baee64776.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e1a6cd95707c57e85eafd43f7b9fbcd.png)
更新时间:2016-12-06 04:28:31
|
【知识点】 根据等边对等角求角度解读
相似题推荐
解答题-问答题
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适中
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名校
【推荐1】如图,直线l与m分别是
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1384d0a02d097ac7aa8a19e8da6f9767.png)
您最近一年使用:0次
解答题-作图题
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适中
(0.65)
【推荐2】数学教师在黑板上呈现一道试题:“已知
是等腰三角形
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”.要求学生画出符合条件的图形,并求出
各角的度数.
小明同学画出如下图形,并在图中标出
各角的度数.请你画出所有符合条件且不同于小明同学的图形,并标出
各角的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
小明同学画出如下图形,并在图中标出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/30/70dfcc55-5f28-48ec-845c-987d59ef53bb.png?resizew=222)
您最近一年使用:0次