如图,△ABC内接于⊙O,且BC是⊙O的直径,AD⊥BC于D,F是弧BC中点,且AF交BC于E,连接OA,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/12/a9d63325-c426-486c-ab2f-64bf2b7f42d9.png?resizew=196)
(1)求证:AE平分∠DAO;
(2)若AB=6,AC=8,求OE的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/12/a9d63325-c426-486c-ab2f-64bf2b7f42d9.png?resizew=196)
(1)求证:AE平分∠DAO;
(2)若AB=6,AC=8,求OE的长.
更新时间:2017-06-18 22:29:49
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【推荐1】在小学,我们已经初步了解到,长方形的对边平行且相等,每个内角都是
.如图,长方形
中,AD=9厘米,
厘米,E为边
上一动点,从点D出发,以1厘米/秒向终点A运动,同时动点P从点B出发,以a厘米/秒向终点C运动,运动的时间为t秒.
时,
①求线段
的长;
②若此时
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(2)若
,且
是以
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①求线段
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②若此时
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(2)若
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【推荐2】如图,将边长为
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折叠,使点
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【推荐1】如图,PAB,PCD是⊙O的两条割线,AB是⊙O的直径,AC
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【推荐2】如图,
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解答题-作图题
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【推荐2】图①、图②、图③均是4×4的正方形网格,每个小正方形的边长均为1,每个小正方形的顶点称为格点,每个小正方形的边称为格线,点A、点B、点C均在格点上,点P、点M在格线上,只用无刻度的直尺,在给定的正方形网格中,分别按下列要求画图,保留作图痕迹.
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(2)在图②中,先标记
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(3)在图③中,以点A、B、M为顶点画平行四边形
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