如图,在⊙O中,弦AD、BC相交于点E,连接OE,已知AD=BC,AD⊥CB.
(1)求证:AB=CD; (2)如果⊙O的半径为5,DE=1,求AE的长.
(1)求证:AB=CD; (2)如果⊙O的半径为5,DE=1,求AE的长.
![](https://img.xkw.com/dksih/QBM/2018/10/25/2061282884083712/2063319922368512/STEM/8a5eb242b3ef4432950f9a283e8e38ce.png?resizew=118)
19-20九年级上·江苏扬州·阶段练习 查看更多[5]
江苏省江都区第三中学2019届九年级上学期第一次月考数学试题江西省南昌市2018-2019学年科技学院附中九年级上学期12月中考数学月考试卷江苏省海安市九校2020-2021学年九年级上学期第一次阶段测试数学试题(已下线)第13课 圆心角-【帮课堂】2022-2023学年九年级数学上册同步精品讲义(浙教版)广东省惠州市惠阳区凤凰山学校2022-2023学年九年级上学期12月月考数学试题
更新时间:2018-10-28 13:38:02
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解答题-证明题
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适中
(0.65)
【推荐1】如图,在
中,
是一条不过圆心O的弦,点C,D是
的三等分点,直径
交
于点F,连结
交
于点G,连结
,连结
交
于点N,过点C的切线交
的延长线于点H.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/29/b339b8a0-8770-4b76-b4a9-fcad816ea417.png?resizew=329)
(1)求证:
;
(2)若
,求
的值;
(3)若
的半径为5,
,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/29/b339b8a0-8770-4b76-b4a9-fcad816ea417.png?resizew=329)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bda6099815c28ad4901e0e043c07ef6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8a5858d4cb71dcd0ec498120a209382.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab6990b8426a4c952f6b9ad99e9f188.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85a97f5a661b48581b021bbfc3e5118b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a4b4ad9535629b699b7429996484a9.png)
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解答题-证明题
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适中
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真题
【推荐2】如图,⊙O的半径为5,点P在⊙O外,PB交⊙O于A、B两点,PC交⊙O于D、C两点.
![](https://img.xkw.com/dksih/QBM/2015/7/21/1573879886577664/1573879892377600/STEM/b79c1aab4a12464999b9535cba225237.png?resizew=229)
(1)求证:PA•PB=PD•PC;
(2)若PA=
,AB=
,PD=DC+2,求点O到PC的距离.
![](https://img.xkw.com/dksih/QBM/2015/7/21/1573879886577664/1573879892377600/STEM/b79c1aab4a12464999b9535cba225237.png?resizew=229)
(1)求证:PA•PB=PD•PC;
(2)若PA=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f437faeb16b4b1de21339b6d7f7205af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a3cb405bfc9dd48a1533b01c458a3d0.png)
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