如图所示,
是
的直径,点
为线段
上一点(不与
,
重合),作
,交
于点
,垂足为点
,作直径
,过点
的切线交
的延长线于点
,
于点
,连接
试证明:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/77e2425c-11aa-4d0b-b4bf-323a44d97d68.png?resizew=145)
(1)
是
的角平分线;
(2)
.
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c84a7cd47edd57011a3816f7180995b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f392902d611863c6908a48e696e7bd8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f96cb123d292cfdb6d9e0b1caf5ea56.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/77e2425c-11aa-4d0b-b4bf-323a44d97d68.png?resizew=145)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d451070229ac0bbba9fe73dbd9600602.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21204d1c00149a21f59c004f6b927237.png)
17-18九年级·全国·单元测试 查看更多[4]
人教版2019届九年级数学上 第二十四章圆 检测试题河南省驻马店市正阳县2022-2023学年九年级上学期期中数学试题(已下线)专题2.6 切线的判定和性质【九大题型】-2023-2024学年九年级数学上册举一反三系列(苏科版)(已下线)专题24.6 切线的判定和性质【九大题型】-2023-2024学年九年级数学上册举一反三系列(人教版)
更新时间:2022-12-29 12:24:10
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解答题-证明题
|
适中
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名校
【推荐1】如图,在平面直角坐标系中,点A,
的坐标分别是
,
,动点P从点
出发,沿
轴正方向以每秒
个单位的速度运动,同时动点
从点
出发,沿射线
方向以每秒
个单位的速度运动.以
,
为邻边构造
在线段
延长线上一动点
,且满足
,设点
运动时间为
秒.
运动到线段
中点时,
,点
的坐标为 ;
(2)当点
在线段
上运动时,求证:四边形
为平行四边形;
(3)当
时,求四边形
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85f28d35611af6d2c64ad19771297f1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c49350d67653f4fad39dcadec2460c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5a122e25cf4eb9f03ffe5ec823bfc31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e384b4b8e9dbc1af84b28aea30e367d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf0eebdf020e4157297aa7410b67c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58e65831c1e6103af4c0bb4a4a61b964.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85bdcc2742be52cc80ba7dbe79f9a574.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58e65831c1e6103af4c0bb4a4a61b964.png)
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解答题-问答题
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【推荐2】如图,已知点B、C、F、E在同一直线上,∠A=∠D,BF=EC,AB//DE ,若∠1=80°,求∠BFD的度数;
![](https://img.xkw.com/dksih/QBM/2018/4/8/1919754042703872/1921242705829888/STEM/d108586e5ebb40269efcd979fd96dc41.png?resizew=154)
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解答题-证明题
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【推荐1】如图,⊙O是△ABC的外接圆,O在AC上,过点C作⊙O的切线,与AB延长线交于点D,过点O作OE
BC,交⊙O于点E,连接CE交AB于点F.
![](https://img.xkw.com/dksih/QBM/2022/5/20/2983530272088064/2984238453096448/STEM/b2a041b2-1fdb-4513-80c2-469eb545f73c.png?resizew=152)
(1)求证:CE平分∠ACB;
(2)连接OD,若CF=CD=6,求OD的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://img.xkw.com/dksih/QBM/2022/5/20/2983530272088064/2984238453096448/STEM/b2a041b2-1fdb-4513-80c2-469eb545f73c.png?resizew=152)
(1)求证:CE平分∠ACB;
(2)连接OD,若CF=CD=6,求OD的长.
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【推荐2】如图,
是
的直径,
是
的弦,
的平分线交
于点D,过点D作
交
的延长线于点E,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/12/68062eeb-5ded-4e63-8331-8529cc419b4c.png?resizew=130)
(1)求证:
是
的切线;
(2)若
,
,则
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/12/68062eeb-5ded-4e63-8331-8529cc419b4c.png?resizew=130)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070bc896d35495237fd65576e9b6f88e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
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解答题-作图题
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【推荐3】下面是小明同学设计的“作圆的内接正方形”的尺规作图过程.
已知:如图,⊙O.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/6/14/6f043644-b58c-4004-aad9-7f5294897f26.png?resizew=128)
求作:⊙O的内接正方形.
作法:① 作⊙O的直径AB;
② 分别以点A,B为圆心,大于
AB同样长为半径作弧,两弧交于M,N;
③ 作直线MN交⊙O于点C,D;
④ 连接AC,BC,AD,BD.
∴ 四边形ACBD就是所求作的正方形.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/6/14/1200d3a0-a65e-405e-8133-92721819810d.png?resizew=160)
根据小明设计的尺规作图过程,
(1)使用直尺和圆规,补全图形(保留作图痕迹);
(2)完成下面的证明.
证明:∵ MN是AB的 ,
∴ ∠AOC = ∠COB = ∠BOD = ∠DOA = 90°.
∴ AC = BC = BD = AD.( )(填推理依据)
∴ 四边形ACBD是菱形.
又∵AB是⊙O的直径,
∴ ∠ACB = 90°.( )(填推理依据)
∴ 四边形ACBD是正方形.
已知:如图,⊙O.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/6/14/6f043644-b58c-4004-aad9-7f5294897f26.png?resizew=128)
求作:⊙O的内接正方形.
作法:① 作⊙O的直径AB;
② 分别以点A,B为圆心,大于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
③ 作直线MN交⊙O于点C,D;
④ 连接AC,BC,AD,BD.
∴ 四边形ACBD就是所求作的正方形.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/6/14/1200d3a0-a65e-405e-8133-92721819810d.png?resizew=160)
根据小明设计的尺规作图过程,
(1)使用直尺和圆规,补全图形(保留作图痕迹);
(2)完成下面的证明.
证明:∵ MN是AB的 ,
∴ ∠AOC = ∠COB = ∠BOD = ∠DOA = 90°.
∴ AC = BC = BD = AD.( )(填推理依据)
∴ 四边形ACBD是菱形.
又∵AB是⊙O的直径,
∴ ∠ACB = 90°.( )(填推理依据)
∴ 四边形ACBD是正方形.
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解答题-证明题
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【推荐1】如图,
内接于
,AB为直径,作
交AC于点D,延长BC,OD交于点F,过点C作
的切线CE,交OF于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/28/fa03d544-a584-4f53-afc0-a7c59fc93d03.png?resizew=149)
(1)求证:
;
(2)若
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cee097d4fe948c3d4f1b5c28b24adf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/28/fa03d544-a584-4f53-afc0-a7c59fc93d03.png?resizew=149)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b0175dc2b94c0825fc250da0a2ba648.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e3dfcd8aff269dd5aba398816490c6.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5201fc26d013f6fb889933c0e32f5c53.png)
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【推荐2】已知,△ABC中,∠ACB=90°,AC=BC=8,点A在半径为5的⊙O上,点O在直线l上.
(1)如图①,若⊙O经过点C,交BC于点D,求CD的长.
(2)在(1)的条件下,若BC边交l于点E,OE=2
,求BE的长.
(3)如图②,若直线l还经过点C,BC是⊙O 的切线,F为切点,则CF的长为____.
(1)如图①,若⊙O经过点C,交BC于点D,求CD的长.
(2)在(1)的条件下,若BC边交l于点E,OE=2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b11b53e957bf1f2cfb96b7e397988014.png)
(3)如图②,若直线l还经过点C,BC是⊙O 的切线,F为切点,则CF的长为____.
![](https://img.xkw.com/dksih/QBM/2019/5/14/2203474820931584/2205677292412928/STEM/48a87c74c8304abe9be657670cb51831.png?resizew=337)
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