如图,在
中,
,以AB为直径的
分别交AC、BC于点D、E,BC的延长线与
的切线AF交于点F.
;
(2)若
,
,求CE,AF的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b6e4a2df58a236c20df5df0d29a466c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad9ca02cdd7e2c32d0e255eb8bb6c43b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/519d3cbe962154438e43a23b0d9eda2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76da10816035c81ebe52fa249264706a.png)
2021·江苏无锡·二模 查看更多[4]
江苏省无锡市锡山区2020-2021学年九年级下学期期中考试数学试题(已下线)专题3.33 圆的综合题-圆与三角函数(专项练习)-2021-2022学年九年级数学下册基础知识专项讲练(北师大版)(已下线)卷3-备战2022年中考数学【名校地市好题必刷】全真模拟卷(江苏扬州专用)·第二辑2024年江苏省扬州市江都区邵樊片九年级数学中考第二次模拟试题
更新时间:2021-09-07 13:40:01
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解答题-问答题
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适中
(0.65)
【推荐1】如图,在梯形
中,
,
交边
于点
.
![](https://img.xkw.com/dksih/QBM/2019/10/25/2319697994514432/2320434763620352/STEM/0853ead47ff1402dbb1b174ad20305b2.png?resizew=399)
(1)当点
与
恰好重合时(如图1),求
的长;
(2)问:是否可能使
、
与
都相似?若能,请求出此时
的长;若不能,请说明理由(如图2).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92854b63c255b39ea4263190eb3da1ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/531d6f90f144551a35d494b1fe7d2b89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2019/10/25/2319697994514432/2320434763620352/STEM/0853ead47ff1402dbb1b174ad20305b2.png?resizew=399)
(1)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)问:是否可能使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
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解答题-问答题
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适中
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【推荐2】如图,一艘渔船自西向东航行,航行到
处看到小岛
位于船的北偏东
方向
海里处,经过一段时间后,渔船到达
点,此时看到小岛
位于船的北偏西
方向上.
(1)求该渔船从
航行到
的航程
(保留根号);
(2)若小岛
周围
海里内有暗礁,该渔船在航行过程中是否有触礁危险?如有触礁危险,请求出该航线上有危险的航段长;如没有危险,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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(1)求该渔船从
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)若小岛
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(0.65)
【推荐1】如图,
为
的直径,C为
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的切线,与
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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解答题-证明题
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(0.65)
【推荐2】如图,P为⊙O外一点,PA切⊙O于点A,过点P的任一直线交⊙O于B、C,连结AB、AC,连PO交⊙O于D、E.
(1)求证:∠PAB=∠C.
(2)如果PA2=PD·PE,那么当PA=2,PD=1时,求⊙O的半径.
(1)求证:∠PAB=∠C.
(2)如果PA2=PD·PE,那么当PA=2,PD=1时,求⊙O的半径.
![](https://img.xkw.com/dksih/QBM/2017/10/23/1807819249598464/1831207303741440/STEM/a5e83e5a34624d0491bb5d6f24f346de.png?resizew=172)
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解答题-问答题
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适中
(0.65)
【推荐1】如图,小明沿着马路自东向西前行,当他位于
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真题
【推荐2】如图,二次函数的图象与x轴交于
,
两点,与y轴交于点C,顶点为D.O为坐标原点,
.
(2)求四边形
的面积;
(3)P是抛物线上的一点,且在第一象限内,若
,求P点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54fe2c124d5bbbbe666ee145cd454b6b.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea51de5ca1c2879e7a767a60ce4624cd.png)
(3)P是抛物线上的一点,且在第一象限内,若
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