如图,
是
的直径,
是
的弦,
交
于点E,连接
,
,过点E作
,垂足为F,
.
![](https://img.xkw.com/dksih/QBM/2021/12/17/2874324724547584/2875125795708928/STEM/93ec8cf7-533d-448d-a488-13339082d959.png?resizew=256)
(1)求证:
;
(2)点G在
的延长线上,连接
,
.
①求证:
与
相切:
②当
时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab00e0cff0876c4183a47f1272cf9928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a828edad1e9c2af9fd56748bba0326b.png)
![](https://img.xkw.com/dksih/QBM/2021/12/17/2874324724547584/2875125795708928/STEM/93ec8cf7-533d-448d-a488-13339082d959.png?resizew=256)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
(2)点G在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5232709d9fdb47f60cbdc9bf8e71402.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54352eaee732defe06faae7ad760eec2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
更新时间:2021-12-18 12:41:19
|
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解答题-证明题
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适中
(0.65)
【推荐1】如图,
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(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d636f59faeeccd0a6472babfa1a519d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/025df2a9934b457cf20d91604e430612.png)
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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,
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的直径,点C在
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,
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(1)求证![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ea2b4362b4260e1afc09b291fe10bd1.png)
(2)求证
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
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(1)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ea2b4362b4260e1afc09b291fe10bd1.png)
(2)求证
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解答题-证明题
|
适中
(0.65)
【推荐1】如图,在
中,
,以
为直径作
,交线段
于点
,过点
作
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/11/63700da6-29f4-452b-b93e-a37174dfc2cb.png?resizew=166)
(1)求证:
是
的切线.
(2)当
,
时,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b62ce0cbffa4758c7a0e6fb7ca4d24e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/11/63700da6-29f4-452b-b93e-a37174dfc2cb.png?resizew=166)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/691048ce61c91a8a3680fa3025193160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df003447e98fd5ba9badd42177f345db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667349d99185bb045030b733352ff7fd.png)
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解答题-证明题
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适中
(0.65)
名校
【推荐2】如图所示,AB是⊙O的直径,AD与⊙O相切于点A,DE与⊙O相切于点E,点C为DE延长线上一点,且CE=CB.
(1)求证:BC为⊙O的切线;
(2)若AB=4,AD=1,求线段CE的长.
(1)求证:BC为⊙O的切线;
(2)若AB=4,AD=1,求线段CE的长.
![](https://img.xkw.com/dksih/QBM/2018/3/13/1901099929731072/1902682234232832/STEM/fc573a0b59734a54b5bfbc7a15f4b717.png?resizew=147)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,已知
内接于
,
是
的直径,作
,交
的延长线于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/13/f919da5b-9d61-4d66-87e8-47acd9032eb7.png?resizew=206)
(1)求证:
是
的切线.
(2)若
,
,求
的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71df1520fa9b965f7d42bc1bc3eb4e2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/13/f919da5b-9d61-4d66-87e8-47acd9032eb7.png?resizew=206)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3a2a325fa8c7507ac0b688d8e44b732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1122c93a3107289ec38c3145dddaad5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
您最近一年使用:0次