如图,一块等腰三角形钢板的底边长为
,腰长为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/3922c483-0719-4f39-908e-7d37988da6b9.png?resizew=167)
(1)求能从这块钢板上截得的最大圆的半径:
(2)用一个圆完整覆盖这块钢板,这个圆的最小半径是多少
?
(3)求这块等腰三角形钢板的内心与外心之间距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f748a2fff2648c65b80355004b13bbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e551c9a6d3365005d38c00bc0436868.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/3922c483-0719-4f39-908e-7d37988da6b9.png?resizew=167)
(1)求能从这块钢板上截得的最大圆的半径:
(2)用一个圆完整覆盖这块钢板,这个圆的最小半径是多少
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
(3)求这块等腰三角形钢板的内心与外心之间距离.
22-23九年级上·山东日照·期中 查看更多[2]
山东省日照市东港区新营中学2022-2023学年九年级上学期期中数学试题(已下线)清单08 与圆有关的常见7种辅助线 (7种题型解读(27题))-2023-2024学年九年级数学上学期期末考点大串讲(苏科版)
更新时间:2022-11-12 18:50:02
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图所示,在
中,
,以
为直径的
交
于点E,弦
交
于点F,且
.
(1)证明:
;
(2)若
,
.求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a07d817a3b13d6e3c2ee3f165b64fc4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/24/003a01c0-b970-4c8e-a758-7aa0403d22ac.png?resizew=167)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/680b53673467d5e29454148104e32fec.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b29a1d39a258d9d0de0e3f4fefbdbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc1b86ed5935d9158ebab46ca92c8ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】点I为△ABC的内心,AI的延长线交△ABC的外接圆于D,以D为圆心,DI为半径画弧,是否经过点B与点C?说明理由.
![](https://img.xkw.com/dksih/QBM/2018/12/18/2099620196556800/2101495964917761/STEM/a957d8298cfc42d4a034ef62932a6ca0.png?resizew=170)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】已知等边三角形ABC.
![](https://img.xkw.com/dksih/QBM/2018/12/10/2093812164239360/2095369857236992/STEM/1306a1b99d014d159007e1feb1776a19.png?resizew=161)
(1)用尺规作图找出△ABC外心O.
(2)记外心O到三角形三边的距离和为d,到三角形三个顶点的距离和为D,求
的值
![](https://img.xkw.com/dksih/QBM/2018/12/10/2093812164239360/2095369857236992/STEM/1306a1b99d014d159007e1feb1776a19.png?resizew=161)
(1)用尺规作图找出△ABC外心O.
(2)记外心O到三角形三边的距离和为d,到三角形三个顶点的距离和为D,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/965addfa96ebfa85bcbb4fc3752bb7fb.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐1】如何仅用圆规和无刻度的直尺过圆外一点作已知圆的切线呢?请同学们阅读下面的分析:如图1,如果
与
相切于点
,那么
,即
,根据“圆周角定理的推论:
的圆周角所对的弦是直径”可以得出:点
既在
上,也在以
为直径的圆上,是两圆的公共点.
的中点
,然后画以点
为圆心,以
为半径的圆就可以确定切点的位置,切点分别记为
、
,画出直线
和
,即为经过圆外一点
的
的两条切线;
(2)在(1)的条件下,若
的直径
与
交于点
,连接
、
、
.求证:点
是
的内心.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1980b05571b2505012d9966e67ef16d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b15b185062675704cf6a41d5f16b232.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)在(1)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb52bba9798c625c7cd778636bceea32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,在
的正方形网格中,有部分网格线被擦去.点
,
,
在格点(正方形网格的交点)上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/4f4723d8-78e7-4d72-a66f-6b58e40d0496.png?resizew=350)
(1)请用无刻度的直尺在图1中找到三角形
的外心
;
(2)请用无刻度的直尺在图2中找到三角形
的内心
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd4be97adde17423d59d86d18318c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/4f4723d8-78e7-4d72-a66f-6b58e40d0496.png?resizew=350)
(1)请用无刻度的直尺在图1中找到三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)请用无刻度的直尺在图2中找到三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】已知:如图,以点
为顶点作两个直角三角形
,
,
,
,
,有一组直角边重合,连接
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/17/219c91ea-53d9-44c4-b591-d580f8409991.png?resizew=163)
(1)试说明:
;
(2)延长
交
于点
,求
的度数;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5daa5b301a9bc62a8e062466d968eda1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1f6c61f02788ef08833d6ef5ae937d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab41054fa9ce51b68e78d9c0cf398d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75a91778530fee017af63165397d36b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf11c53280ba4e744cdf65d726365759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/17/219c91ea-53d9-44c4-b591-d580f8409991.png?resizew=163)
(1)试说明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb7852eb99a283b8f0bd5a4dff3c2def.png)
(2)延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe5298af0022225a14269545801c89f.png)
您最近一年使用:0次
解答题-计算题
|
适中
(0.65)
【推荐2】如图,
为数轴原点,
,
两点表示的数分别为
,3,作腰长为4的等腰三角形
,连接
.以点
为圆心、
的长为半径画弧,交数轴正半轴于点
.求点
表示的数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fb134b2b48acc99213fff6ccfee65f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次