如图,AB是⊙O的一条弦,C、D是⊙O上的两个动点,且在AB弦的异侧,连接CD.
(1)若AC=BC,AB平分∠CBD,求证:AB=CD;
(2)若∠ADB=60°,⊙O的半径为1,求四边形ACBD的面积最大值.
(1)若AC=BC,AB平分∠CBD,求证:AB=CD;
(2)若∠ADB=60°,⊙O的半径为1,求四边形ACBD的面积最大值.
![](https://img.xkw.com/dksih/QBM/2020/3/24/2426279150239744/2427421589905408/STEM/9a5b67553fad42bf8e8962c7d0cdd785.png?resizew=113)
19-20九年级下·安徽合肥·阶段练习 查看更多[3]
2020年安徽省合肥四十六中南校区3月中考模拟数学试题浙江省金华市2020-2021学年九年级上学期期末数学试题(已下线)专题29 圆与四边形综合-【微专题】2022-2023学年九年级数学上册常考点微专题提分精练(人教版)
更新时间:2020-03-25 23:44:46
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适中
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适中
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【推荐2】已知
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适中
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适中
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适中
(0.65)
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解答题-证明题
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适中
(0.65)
【推荐2】如图,在
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①
与
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②四边形
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③
_________.
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①
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②四边形
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③
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