如图,在
中,
是
边上的高,
平分
,
,
,则
的度数是( )
![](https://img.xkw.com/dksih/QBM/2021/1/8/2631701977653248/2634364548423680/STEM/9f464541-d0a0-4e34-a4d0-40afc27f930e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7099026716ee1821dd7d9f157dc055f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01b02a4bd12e2231f35e8ae618209d10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57e7106619c08f2bcc1d21f846e8a0de.png)
![](https://img.xkw.com/dksih/QBM/2021/1/8/2631701977653248/2634364548423680/STEM/9f464541-d0a0-4e34-a4d0-40afc27f930e.png)
A.14° | B.24° | C.19° | D.9° |
20-21八年级上·内蒙古呼和浩特·期末 查看更多[5]
内蒙古自治区呼和浩特市2020-2021学年八年级上学期期末数学试题(已下线)第十四章 三角形(提高卷)-2020-2021学年七年级数学下学期期末专项复习(沪教版)江西省上饶市余干县2021-2022学年八年级上学期第一次月考数学试题辽宁省铁岭地区2023-2024学年八年级上学期期末考试数学试题四川省泸州市合江县第五片区2022-2023学年八年级上学期期末定时作业数学试题
更新时间:2021-01-12 08:51:18
|
【知识点】 与角平分线有关的三角形内角和问题解读
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【推荐1】如图,在
中,点D在边BA的延长线上,∠ABC的平分线和∠DAC的平分线相交于点M,若∠BAC=80°,∠ABC=40°,则∠M的大小为( )
![](https://img.xkw.com/dksih/QBM/2020/8/4/2520474503323648/2524205332930560/STEM/d449868f-e113-4a0a-ac0d-5c2117d3f831.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/2020/8/4/2520474503323648/2524205332930560/STEM/d449868f-e113-4a0a-ac0d-5c2117d3f831.png)
A.20° | B.25° | C.30° | D.35° |
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