如图,△ABC中,∠A=56,BD平分∠ABC,CD平分△ABC的外角∠ACE,BD、CD交于点D,则∠D的度数( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/3/7b217d74-f3a7-442c-a2ad-25b3616cbadb.png?resizew=211)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/3/7b217d74-f3a7-442c-a2ad-25b3616cbadb.png?resizew=211)
A.28 | B.56 | C.30 | D.26 |
21-22七年级下·江苏扬州·阶段练习 查看更多[5]
江苏省扬州市宝应县东北片联考2021-2022学年七年级下学期第一次月考数学试题(已下线)专题11.2 与三角形有关的角(专项训练)-2022-2023学年八年级数学上册《同步考点解读·专题训练》(人教版)(已下线)第一次月考押题培优01卷(考试范围:1.1-2.5)-【微专题】2022-2023学年八年级数学上册常考点微专题提分精练(浙教版)(已下线)第2课时 与三角形有关的角-2022-2023学年八年级数学上册同步考点知识清单+例题讲解+课后练习(人教版)(已下线)专题7.5 多边形内角和和外角和(专项训练)-2022-2023学年七年级数学下册《同步考点解读·专题训练》(苏科版)
更新时间:2022-08-03 12:32:09
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【推荐1】如图,在四边形ABCD中,对角线BD平分∠ABC,∠DBC=30°,∠BAD=∠BDC=90°,E为BC的中点,AE与BD相交于点F,若CD=2,则BF的长为( )
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【推荐2】如图,直线
,
,
分别为直线
、
上的点,
为两平行线间的点,连接
、
,过点
作
平分
交直线
于点
,过点
作
,交直线
于点
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【推荐1】如图,
的平分线相交于点F,过点F作
,分别交
于点D,E,那么有下列结论:①
;②
;③
的周长等于
与
的周长之和;④
,
都是等腰三角形;⑤
,其中正确结论的序号有( )
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