如图,
是
的直径,
、
是
的弦,
,垂足为
,连接
并延长,与过点
的直线
相交于点
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/5aec6a34-3456-40ea-a21d-d78de61c618d.png?resizew=244)
(1)求证:
是
的切线;
(2)若
的半径为5,
,求线段
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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0c63b059ba911da3429c190f40d6a9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/5aec6a34-3456-40ea-a21d-d78de61c618d.png?resizew=244)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.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/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
2023九年级上·江苏·专题练习 查看更多[1]
(已下线)专题09圆的有关位置关系及计算2(十大类型)-【好题汇编】备战2023-2024学年九年级数学上学期期末真题分类汇编(苏科版)
更新时间:2024-02-19 14:28:21
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解答题-问答题
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【推荐1】如图已知⊙O的半径长为25,弦AB长为48,OC平分AB,求AC的长.
![](https://img.xkw.com/dksih/QBM/2020/10/5/2564415834488832/2566610329534464/STEM/4eaf8d48b04c445a8dbb90ff0448e3ab.png?resizew=127)
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【推荐2】如图,AB为⊙O的直径,弦CD⊥AB于E,点F在DC的延长线上,AF交⊙O于G.
![](https://img.xkw.com/dksih/QBM/2022/8/31/3056466589024256/3069035780898816/STEM/35cb05d17d8248cdabe47d7aac0afe3b.png?resizew=255)
(1)求证:∠FGC=∠ACD;
(2)若AE=CD=8,试求⊙O的半径.
![](https://img.xkw.com/dksih/QBM/2022/8/31/3056466589024256/3069035780898816/STEM/35cb05d17d8248cdabe47d7aac0afe3b.png?resizew=255)
(1)求证:∠FGC=∠ACD;
(2)若AE=CD=8,试求⊙O的半径.
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【推荐1】已知四边形
内接于
,
为
的直径,连接
.
中点,
,求
和
的大小;
(2)如图②,若点C为
中点,过点C作
的切线与弦
的延长线交于点E,连接
,当
,半径为3时,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/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/667349d99185bb045030b733352ff7fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40988df1502e95971ecd61a30f509c76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5157b42da58d55daad27d98b2fec15ff.png)
(2)如图②,若点C为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd6ffb78dad3375efa3b08ab518553d.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/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
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解答题-作图题
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【推荐2】如图,由小正方形构成的
网格,每个小正方形的顶点叫做格点.
经过A,B,C三个格点,仅用无刻度的直尺在给定网格中按要求画图.(保留作图痕迹)
![](https://img.xkw.com/dksih/QBM/2022/11/16/3110765112827904/3133558840033280/STEM/01236d3106c54b9fb7f1d1890c3226bf.png?resizew=499)
(1)在图①中的圆上找一点D(不与点B重合),使
;
(2)在图②中的圆上找一点E,使
平分弧
;
(3)在图③中的圆上找一点F,使
平分
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd4be97adde17423d59d86d18318c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/2022/11/16/3110765112827904/3133558840033280/STEM/01236d3106c54b9fb7f1d1890c3226bf.png?resizew=499)
(1)在图①中的圆上找一点D(不与点B重合),使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6bcb95006d2c0ad94cb112e4189527.png)
(2)在图②中的圆上找一点E,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)在图③中的圆上找一点F,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
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【推荐1】如图,
是
的直径,
是
的弦,
,垂足为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/26/68b673e9-f32b-48f5-8292-65cb9638e671.png?resizew=119)
(1)求证:
是
的切线;
(2)若
,且
的半径
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcb07a30ee93027f4fb87d8dfcf8d45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/26/68b673e9-f32b-48f5-8292-65cb9638e671.png?resizew=119)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfe68599a1521f5458fd3d4159f0629f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c8163b41fbd62b84ec9f586ba6e8fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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【推荐2】如图,
是以
为直径的
的内接三角形,
与
相切于点B,与
的延长线交于点D,E是
的中点,延长
交
的延长线于点F.
与
有怎样的位置关系,并说明理由;
(2)若
,
,求
的长和
的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/d40b319212a7e7528b053e1c7097e966.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eb3d1070981fed5ca65a34bb2282e6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/271d7f3184082535bfbf95b6692dbf0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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解答题-作图题
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【推荐1】点A(3,4),B(4,3)在反比例函数y=
图象上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/17/4d47b2e3-8191-4bcc-8f26-f1b2b853d1ef.png?resizew=275)
(1)在平面直角坐标系中,画出反比例函数y=
的图象;
(2)连接OA,OB,AB,反比例函数y=
图象上是否存在一点M(M不与B重合),使得
?若存在,求出点M的坐标,若不存在,说明理由.
(3)已知点P在反比例函数y=
图象上,点Q在x轴上,点A,B,P,Q是平行四边形的四个顶点,直接写出点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e27795db2c7c758ef37d29dac96f06.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/17/4d47b2e3-8191-4bcc-8f26-f1b2b853d1ef.png?resizew=275)
(1)在平面直角坐标系中,画出反比例函数y=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e27795db2c7c758ef37d29dac96f06.png)
(2)连接OA,OB,AB,反比例函数y=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e27795db2c7c758ef37d29dac96f06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb5a88e9fb7a6c4972e015aa570c5149.png)
(3)已知点P在反比例函数y=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e27795db2c7c758ef37d29dac96f06.png)
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【推荐2】已知:如图,在
中,
,
,点
、
分别是边
、
的中点,
交
的延长线于点
.
是菱形;
(2)连接
,如果
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ecfbef213f840ae43d0ca589eb250f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b00a5239269d72d6f9632e7d77347106.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a5a2949b3d520ed03d57126c7d4d8d.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b937442ad4cc480adc11bb143559454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c369b0bcf1fc6308ca9210fdddb384df.png)
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