如图,
和
相交于点O,
.
![](https://img.xkw.com/dksih/QBM/2022/11/2/3100988697690112/3101521000087552/STEM/7cd527bf72e841cd9f6df3d1a840947f.png?resizew=190)
(1)求证
.
(2)分别过点B、O作
的垂线,交于点E.若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bd884bafe9ae693434f481ddcdd615b.png)
![](https://img.xkw.com/dksih/QBM/2022/11/2/3100988697690112/3101521000087552/STEM/7cd527bf72e841cd9f6df3d1a840947f.png?resizew=190)
(1)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
(2)分别过点B、O作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ae1210a744ae636419de68a525faf28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc411cd47e33857b284186a5fd7958f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
更新时间:2022-11-03 09:23:32
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解答题-证明题
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【推荐1】如图,在
中,
,垂足为
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,垂足为
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.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐2】如图,四边形OAEC是平行四边形,以O为圆心,OC为半径的圆交CE于D,延长CO交
O于B,连接AD、AB,AB是
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![](https://img.xkw.com/dksih/QBM/2022/1/7/2896413049970688/2901394434465792/STEM/9e100e01-b832-4ac1-a36e-a7f91bb52b46.png?resizew=165)
(1)求证:AD是
O的切线.
(2)若
O的半径为4,
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![](https://img.xkw.com/dksih/QBM/2022/1/7/2896413049970688/2901394434465792/STEM/9e100e01-b832-4ac1-a36e-a7f91bb52b46.png?resizew=165)
(1)求证:AD是
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(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/091e86ca89e484b331fd90125a5e5af3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
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解答题-作图题
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【推荐1】如图,四边形区域是音乐广场的一部分,现在要在这一区域内建一个喷泉,要求喷泉到两条道路
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【推荐2】如图.在矩形
中,小聪同学利用直尺和圆规完成了如下操作:
①分别以点B和D为圆心,以大于
的长为半径作弧,两弧相交于点M和N;
②作直线
,交
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于点F,连接
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判断四边形
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①分别以点B和D为圆心,以大于
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②作直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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判断四边形
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解答题-问答题
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【推荐1】如图,一次函数的图象与
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/27051b9b-dfa7-43dc-beb4-d261d730c113.png?resizew=196)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/27051b9b-dfa7-43dc-beb4-d261d730c113.png?resizew=196)
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