如图,已知
内接于
,
是
的直径,
的平分线交
于点D,交
于点E,连接
,作
,交
的延长线于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/9/f3ac1950-2615-4c4d-b52e-3190bee9ad1c.png?resizew=182)
(1)求证:
是
的切线;
(2)若
,求
的半径.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
![](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/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d6f87da73b72e022bc07e6972f62cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/9/f3ac1950-2615-4c4d-b52e-3190bee9ad1c.png?resizew=182)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80ad6a9bcd1d4b3dbb06cdf8f9f9ae68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
21-22九年级上·重庆武隆·期末 查看更多[19]
重庆市武隆区武隆区江口中学校2021-2022学年九年级上学期期末数学试题湖北省十堰市房县2022-2023学年九年级上学期期末学业水平检测数学试题2023年山东省枣庄市第十五中学中考二模数学试题(已下线)安徽省铜陵市铜官区2022-2023学年九年级上学期期末数学试题(已下线)专题05 直线与圆的位置关系及切线的判定与性质(6个考点六大类型)-2023-2024学年九年级数学上册《知识解读·题型专练》(苏科版)(已下线)专题2.23 切线的性质与判定(基础练)-2023-2024学年九年级数学上册基础知识专项突破讲与练(苏科版)(已下线)专题2.41 几何模型专题(切线的证明)(分类练习)-2023-2024学年九年级数学上册基础知识专项突破讲与练(苏科版)(已下线)专题05 直线与圆的位置关系及切线的判定与性质(6个考点六大类型)(题型专练)-2023-2024学年九年级数学上册《知识解读·题型专练》(人教版)(已下线)2023年四川省宜宾市中考数学真题变式题23-25题(已下线)2023年四川省遂宁市中考数学真题变式题21-25题广西壮族自治区南宁市青秀区天桃实验学校2023-2024学年九年级上学期期中数学试题广西壮族自治区南宁市天桃实验学校2023-2024学年九年级上学期期中数学试题(已下线)专题24.22 切线的性质与判定(基础练)-2023-2024学年九年级数学上册基础知识专项突破讲与练(人教版)(已下线)专题03 圆(十四大题型)-【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(山东专用)江西省南昌市2023-2024学年九年级上学期期末数学试题(已下线)专题24.47 几何模型专题(切线的证明)(分类练习)-2023-2024学年九年级数学上册基础知识专项突破讲与练(人教版)山东省聊城市冠县2023-2024学年九年级上学期期末数学试题(已下线)专题05 直线与圆的位置关系及切线的判定与性质(6个考点六大类型)-2023-2024学年九年级数学下册《知识解读·题型专练》(北师大版)2023年山东省枣庄市台儿庄区中考二调数学模拟试题
更新时间:2024-03-16 22:03:09
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【推荐1】如图(1),将任意一张正方形纸板,沿一条对角线剪开,可以得到两个全等的等腰直角三角形;将任意一张等边三角形纸板,沿一条高线剪开,可以得到两个全等的含角的直角三角形.如图(2),按图(1)的方法,左边是等腰直角三角形,右边是含
角的直角三角形.如图(3),四边形
是由一个等腰直角三角形和一个含
角的直角三角形拼成,其中左边等腰直角三角形的斜边与右边三角形的较长直角边重合.解答下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/26/45048727-0f54-49f9-9d1a-f6fec26e6c11.png?resizew=371)
(1)如图(2),填空:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e9bb42376c12d7d21702ae8062b25a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ceaf2519d2eb60dd1cf56e8afc45bff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/650eea5ac228433f7baa31676398b86b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67a3c5c2255a30cc1bec23fe131f7882.png)
(2)如图(3),填空,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(3)如图(3),若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e40a9c7ca40d3ac1829a1c0c6c393492.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐2】小亮周末到公园散步,当他沿着一段平坦的直线跑道行走时,前方出现一棵树AC和一栋楼房BD,如图,假设小亮行走到F处时正好通过树顶C看到楼房的E处,此时
,已知树高
米,楼房
米,E处离地面25米.
![](https://img.xkw.com/dksih/QBM/2022/3/31/2947949671522304/2984937208971264/STEM/1d1561c7-8081-4d59-b6db-c237653aaa15.png?resizew=233)
(1)求树与楼房之间的距离AB的长;
(2)小亮再向前走多少米从树顶刚好看不到楼房BD?(结果保留根号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80f62ca01c5ec0dea4c413576f6466c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/addb8e20db1fbb40f17dea52f951b907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cedae5d36da95bb04fe2c2007207fb09.png)
![](https://img.xkw.com/dksih/QBM/2022/3/31/2947949671522304/2984937208971264/STEM/1d1561c7-8081-4d59-b6db-c237653aaa15.png?resizew=233)
(1)求树与楼房之间的距离AB的长;
(2)小亮再向前走多少米从树顶刚好看不到楼房BD?(结果保留根号)
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【推荐2】如图,已知
为⊙O的直径,点
、
在⊙O上,
,
、
是线段
、
的延长线上的点,并且
与⊙O相切于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/14/c0928e6a-7a9b-49d8-817b-e76c9e7a89ee.png?resizew=164)
(1)求证:
;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b7513e09cccf40c3a483064b97e48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/14/c0928e6a-7a9b-49d8-817b-e76c9e7a89ee.png?resizew=164)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae5a00e4cfa353faf4d02c13af3b3808.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
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【推荐1】如图,⊙O是△ABC的外接圆,AB是⊙O的直径,AB的延长线与过点C的直线相交于点P,过点A作AE垂直于直线CP,垂足是E,交⊙O于点D, AC平分∠BAD.
(1)证明:E P是⊙O 的切线;
(2)若PB﹕PC=1﹕2,探究线段 PB和AB之间的数量关系,并说明理由.
(1)证明:E P是⊙O 的切线;
(2)若PB﹕PC=1﹕2,探究线段 PB和AB之间的数量关系,并说明理由.
![](https://img.xkw.com/dksih/QBM/2020/7/24/2512675030982656/2512997946425345/STEM/156ab313-381f-426f-97ed-931e95159161.png?resizew=188)
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【推荐2】如图,
是
的直径,点C,E在
上,
,点
在线段
的延长线上,且
.
与
相切;
(2)若
,求
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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e14246caa743b4151fb6a208ecd2493.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea039aa542528318ccf8005699e299d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aff745d46dceda3e1f401bf93a5da45b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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【推荐1】如图1,平面直角坐标系
中,点
,
,
,点
为射线
上一动点,连结
,交
轴于点
,⊙
是△
的外接圆,过点
的切线交
轴于点
.
![](https://img.xkw.com/dksih/QBM/2015/8/20/1573899267121152/1573899273715712/STEM/1270ee3352784405bbe877f9f1cd9ea3.png)
(1)判断△
的形状;
(2)当点
在线段
上时,
①证明:△
∽△
;
②如图2,⊙
与
轴的另一交点为
,连结
、
,当四边形
为矩形时,求
;
(3)点
在射线
运动过程中,若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7795aec93c2c7ac2fd93e6747ca6516c.png)
![](https://img.xkw.com/dksih/QBM/2015/8/20/1573899267121152/1573899273715712/STEM/cb48dac8d7d34b1583b2b7164e8b67a1.png)
![](https://img.xkw.com/dksih/QBM/2015/8/20/1573899267121152/1573899273715712/STEM/1b09d089adf14a87b3d3494158d0136b.png)
![](https://img.xkw.com/dksih/QBM/2015/8/20/1573899267121152/1573899273715712/STEM/7a850e93ff8842c78bcb041b828efcea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2015/8/20/1573899267121152/1573899273715712/STEM/1270ee3352784405bbe877f9f1cd9ea3.png)
(1)判断△
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
①证明:△
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20af148464904e21f4374cc8fb886fba.png)
②如图2,⊙
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3533837e3d08c461dea031a44e5424d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9941a690288ef2035261a0e2e914c515.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3af3e7ef9807f99c7f1d240e96759a3a.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/2015/8/20/1573899267121152/1573899273715712/STEM/2eca558e44fd4c768b4f80b4c1f2535f.png)
![](https://img.xkw.com/dksih/QBM/2015/8/20/1573899267121152/1573899273715712/STEM/c6d630ab5ba94c5fb2804267aa7b8882.png)
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【推荐2】如图1,在
中,
,AB是
的直径,
交AC于点D,过点D的直线交BC于点E,交AB的延长线于点P,PD是
的切线.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/2/c243a519-5545-4261-82dd-6ca41ebd5238.png?resizew=240)
(1)求证:
;
(2)若
,
,求图中阴影部分的周长和面积;
(3)如图2,
,连接DM,交AB于点N,若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.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/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/2/c243a519-5545-4261-82dd-6ca41ebd5238.png?resizew=240)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4a4a1070e72d3cae33ec1a42a7481b2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38c8b54beba73d15e31fb66c2e3b1128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7aadcbbe5b6157d6ae92653400dcd84.png)
(3)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/398fba6c35c4d82840830c0978c392fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1a3f9fece7046bdf79da8dc539c56a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f701d46456ae9f14e94bcb64502377f4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/2/46ae65d9-c6d4-4f95-897a-77c38669b309.png?resizew=236)
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