如图,l∥m,等腰直角三角形ABC的直角顶点C在直线m上,若∠β=20°,则∠α的度数为( )
A.25° | B.30° |
C.20° | D.35° |
2011·山东泰安·中考真题 查看更多[13]
(已下线)2011年初中毕业升学考试(山东泰安卷)数学(已下线)2011年初中毕业升学考试(天津卷)数学广东省深圳市育才三中2018-2019学年北师大版七年级(下)期中测试数学试题北师大版八年级上第七章 综合能力检测卷山东省青岛市阳谷外国语学校2018-2019学年七年级下学期期末数学试题山东省菏泽市郓城县育人学校2020-2021学年九年级下学期数学第一次月考数学试题贵州省铜仁市松桃苗族自治县2020-2021学年七年级下学期期末数学试题广东省茂名市高州市十校联考2020-2021学年七年级下学期6月月考数学B试题广东省河源市田家炳实验中学2022-2023学年七年级下学期数学2月测试题2023年山东省泰安市泰山区树人外国语学校中考一模数学试题湖北省崇阳县大集中学2021-2022学年七年级下学期期末模拟数学试题2024年淄博市高青县第三中学中考数学第一次模拟考试预测题山东省德州市德城区第五中学2023-2024学年七年级下学期第一次月考数学试题
更新时间:2016-12-05 03:20:49
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【推荐1】如图,BA1和CA1分别是△ABC的内角平分线和外角平分线,BA2是∠A1BD的角平分线CA2是∠A1CD的角平分线,BA3是A2BD∠的角平分线,CA3是∠A2CD的角平分线,若∠A1=α,则∠A2013为( )
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,已知点
在
上,点
在
上,
,且
,若
.则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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【推荐1】如图,
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【推荐2】如图,延长
的边
到点
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作
,
平分
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平分
交
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的大小为( )
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