如图,四边形
是
的内接四边形,且对角线
为
的直径,过点A作
,与
的延长线交于点E,且
平分
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/28/d650989a-3d33-46e2-92c1-89b977c6c5d4.png?resizew=152)
(1)求证:
是
的切线;
(2)若
的半径为5,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4611ceb2a28f7a7e4d24266d7f99b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d3e081637bcea5368cc72370bae283b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/28/d650989a-3d33-46e2-92c1-89b977c6c5d4.png?resizew=152)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca7e1a727ba332984ad857b3d25344d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
22-23九年级上·陕西西安·期末 查看更多[4]
陕西省西安市经开第一中学2022-2023学年九年级上学期期末数学学情调研试题 广东省江门市新会区司前中学2022-2023学年九年级上学期数学期末教育质量检测(已下线)黄金卷01-【赢在中考·黄金8卷】备战2023年中考数学全真模拟卷(江苏徐州专用)2023年广西防城港市防城区中考二模数学试题
更新时间:2023-01-27 16:39:31
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解答题-问答题
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适中
(0.65)
【推荐1】已知:
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是
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您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图
,
是
的两条切线,切点分别为
,
;
是
的直径,
,过点
作
于
,交
于点
.
![](https://img.xkw.com/dksih/QBM/2022/1/26/2902679152533504/2902887749976064/STEM/0f55caac65714f47b029097e655ec232.png?resizew=135)
(1)求证:
;
(2)若
,求
长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ce1475f537b4ad21775bfaa16daa0c.png)
(2)若
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解答题-作图题
|
适中
(0.65)
【推荐1】已知Rt△AEC中,∠E=90°,请按如下要求进行操作和判断:
(1)尺规作图:作△AEC的外接圆⊙O,并标出圆心O(不写画法);
(2)延长CE,在CE的延长线上取点B,使EB=EC,连结AB,设AB与⊙O的交点为D(标出字母B、D),判断:图中
与
相等吗?请说明理由.
(1)尺规作图:作△AEC的外接圆⊙O,并标出圆心O(不写画法);
(2)延长CE,在CE的延长线上取点B,使EB=EC,连结AB,设AB与⊙O的交点为D(标出字母B、D),判断:图中
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您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,
是
的直径,点
在
上,
,过点
作直线
,交
的延长线于
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/14/6c005e4c-b14f-436d-a824-017859cbcd30.png?resizew=167)
(1)求证:
是
的切线;
(2)如果
的半径为
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3a51949f48ee8cf746851ba779b078e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d68f2d6003a4bcd1b0b0307611970fa3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
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(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
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(2)如果
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