如图,AB是⊙O的直径,P为AB延长线上的一个动点,过点P作⊙O的切线,切点为C,连接AC,BC,作∠APC的平分线交AC于点D.下列结论正确的是__ (写出所有正确结论的序号)
①
;
②若∠A=30°,则PC=
BC;
③若∠CPA=30°,则PB=OB;
④无论点P在AB延长线上的位置如何变化,∠CDP为定值.
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5a799de08d4d0dccf4b10b395cd399e.png)
②若∠A=30°,则PC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
③若∠CPA=30°,则PB=OB;
④无论点P在AB延长线上的位置如何变化,∠CDP为定值.
![](https://img.xkw.com/dksih/QBM/2014/8/7/1573743291015168/1573743297224704/STEM/1a2d44e62348438cbe470cf631f9d8bb.png?resizew=177)
2014·湖南岳阳·中考真题 查看更多[6]
2014年初中毕业升学考试(湖南岳阳卷)数学2015届湖南省长沙麓山国际等四校九年级上学期第三次训练数学试卷(2018春)沪科版九年级数学下册第24章达标检测卷(已下线)【万唯原创】2015年安徽省中考数学-试题研究-安徽数学正文33(已下线)【万唯原创】2016年安徽省中考数学-试题研究-单元限时练6(已下线)【万唯原创】2016年安徽省中考数学-面对面-正文-第二部分题型3+4
更新时间:2019-01-30 18:14:09
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【推荐2】如图,直线
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