如图,已知AB//CD,DE⊥AC,垂足为E,∠D=20°,则∠A的度数为( )
![](https://img.xkw.com/dksih/QBM/2022/4/29/2968769615642624/2969226910113792/STEM/52bd469c-d7ab-4ced-b984-144e8e033dcd.png?resizew=120)
![](https://img.xkw.com/dksih/QBM/2022/4/29/2968769615642624/2969226910113792/STEM/52bd469c-d7ab-4ced-b984-144e8e033dcd.png?resizew=120)
A.90° | B.100° | C.110° | D.120° |
2022·山东济南·一模 查看更多[4]
2022年山东省济南市济阳区数学一模试题(已下线)专题11.9 三角形的内角(巩固篇)(专项练习)-2022-2023学年八年级数学上册基础知识专项讲练(人教版)(已下线)专题1.9 认识三角形-三角形的内角(巩固篇)(专项练习)-2022-2023学年八年级数学上册基础知识专项讲练(浙教版)山东省淄博市沂源县沂源县历山中学等校2022-2023学年七年级上学期期中数学试题
更新时间:2022-04-30 11:30:31
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【推荐2】下列命题是真命题的是( )
A.在平面直角坐标系中,点![]() ![]() |
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【推荐1】如图,AB是⊙O的直径,点D在AB的延长线上,过点D作⊙O的切线,切点为C,若∠A=25°,则∠D=( )
![](https://img.xkw.com/dksih/QBM/2019/1/28/2128344181096448/2130009033187328/STEM/023eb9ec47514696b099a5935a5e67a0.png?resizew=153)
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A.50° | B.25° | C.40° | D.65° |
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【推荐2】如图,在
中,
,
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平分
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于点
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作
交边
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于点
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