如图所示,AB是⊙O直径,
弦于点F,且交⊙O于点E,若
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/5/3cc86c2d-66fb-46ee-8da4-3c07c3ec4b5b.png?resizew=202)
(1)判断直线AD和⊙O的位置关系,并说明理由;
(2)当
时,求AD的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a11c1db76cc7e1894f74a50d71736455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6d2ed1f2fa1f07095aa3981d63b1211.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/5/3cc86c2d-66fb-46ee-8da4-3c07c3ec4b5b.png?resizew=202)
(1)判断直线AD和⊙O的位置关系,并说明理由;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be67d8bb9e7f36a248f81410bbba0a2f.png)
21-22九年级上·甘肃武威·期末 查看更多[4]
甘肃省武威市民勤县第六中学2021-2022学年九年级上学期期末数学试题(已下线)专题3.54 圆中的相似问题(基础篇)(专项练习)-2022-2023学年九年级数学下册基础知识专项讲练(北师大版)山东省淄博市临淄区2022-2023学年九年级上学期期末数学试题山东省淄博市张店区张店区第七中学2023-2024学年九年级上学期12月月考数学试题
更新时间:2022-09-04 12:27:11
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相似题推荐
解答题-问答题
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(0.85)
【推荐1】如图,
是
的半径,
是弦,且
于点
连接
并延长交
于点
,若
,
,求
半径
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.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/6cee097d4fe948c3d4f1b5c28b24adf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.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/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/19/c8031565-87e4-46a3-8a40-8e97f1ed4031.png?resizew=158)
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【推荐2】如图,
为
的直径,弦
于点
,连接
,
,
,
为
中点,且
.
(1)求
的长;
(2)当
时,
①
__________;
②求阴影部分的周长和面积.
![](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/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abb7feba3d55eec06e4f29515695943a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/4/639311a6-0d28-404b-b66c-090ec87e1e92.png?resizew=161)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/691048ce61c91a8a3680fa3025193160.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ec5d678ec42846e1d28301e3bfd4be.png)
②求阴影部分的周长和面积.
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解答题-证明题
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【推荐1】如图,
是
的直径,C在
上,延长
至点D,使
.
是
的切线;
(2)若
的半径为
,
,求
的值.
![](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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46887681820d8e486bcb1a0d7c051bec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d82b617bb42905c8e62a7b27f22039ee.png)
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解答题-问答题
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(0.85)
【推荐2】如图,
是
的外接圆,
,
,P是
上的一动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/18/dc918d13-7af3-4032-88f0-b10ad1c8bca7.png?resizew=346)
(1)当
的度数为多少时,
;
(2)若以动点P为切点的切线为
,那么当
的度数为多少时,切线
与
一边平行?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feb1606f91a55ec822fa19b28c441b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b27e47690ed332c573186992b6d25654.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed41d321f4c0717ac5b443aad942d9a7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/18/dc918d13-7af3-4032-88f0-b10ad1c8bca7.png?resizew=346)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59dd5cfc1134a08462e38256529685b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2160a5319834d61c4c6186321a0354b.png)
(2)若以动点P为切点的切线为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59dd5cfc1134a08462e38256529685b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐1】如图,AB是⊙O的直径,D是弦AC延长线上一点,且AB=BD,DB的延长线交⊙O于点E,过点C作CF⊥BD,垂足为点F.
(1)CF与⊙O有怎样的位置关系?请说明理由;
(2)若BF+CF=6,⊙O的半径为5,求BE的长度.
(1)CF与⊙O有怎样的位置关系?请说明理由;
(2)若BF+CF=6,⊙O的半径为5,求BE的长度.
![](https://img.xkw.com/dksih/QBM/2019/7/7/2241930115031040/2243617426259968/STEM/47b5c625b7904614b70ae069cb52869b.png?resizew=209)
您最近一年使用:0次
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【推荐2】如图,在⊙O中,
是⊙O的直径,
是⊙O的弦,
,垂足为
.过点
作⊙O的切线与
的延长线交于点
.
![](https://img.xkw.com/dksih/QBM/2020/12/16/2621777804656640/2625343257796608/STEM/92fd93aa-6dde-4d2f-98ed-bc295254b461.png?resizew=227)
(1)若
,求
的度数;
(2)若
,
,求⊙O的半径.
![](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/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2020/12/16/2621777804656640/2625343257796608/STEM/92fd93aa-6dde-4d2f-98ed-bc295254b461.png?resizew=227)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db17133623795a0e65d9c61745d63187.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b871a762469393cdd22f15aa49ebb8f9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca7e1a727ba332984ad857b3d25344d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a0367c3fe3c5c5dfefec87f641bbde.png)
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解答题-作图题
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较易
(0.85)
名校
【推荐1】如图,在
中,点P为边
上一点,请用尺规作图的方法在
边上求作一点Q,使得
.(保留作图痕迹,不写作法)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/60b10989e742ff5fa1c06ef3b1f1d95a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/cf84eb76-f1a3-45de-8ae7-e7a308beac17.png?resizew=202)
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解答题-证明题
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【推荐2】如图,在
中,
是斜边
上的高.
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/025a9324effb6fc7af086fbaf59af8d5.png)
(2)定义:若线段
满足条件
,则称
是
的比例中项.比如(1)中的
就是
的比例中项.请你判断图中
是不是
的比例中项?说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/025a9324effb6fc7af086fbaf59af8d5.png)
(2)定义:若线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/502491f4e48e1d74ca8cc709840c30b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea77ba313fcc751481ac1ca214df3fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28a77aa6c27acfffcc601d9ca7e6d4c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/16/04bfc4fc-645a-4e1c-8100-793ea9bd0bd9.png?resizew=259)
您最近一年使用:0次