如图,△ABC周长为20cm,BC=6cm,圆O是△ABC的内切圆,圆O的切线MN与AB、CA相交于点M、N,则△AMN的周长为( )
![](https://img.xkw.com/dksih/QBM/2021/11/21/2863059169140736/2899494751444992/STEM/6f5bd4cf-75e1-48f2-8c07-b0e641f5bd05.png?resizew=197)
![](https://img.xkw.com/dksih/QBM/2021/11/21/2863059169140736/2899494751444992/STEM/6f5bd4cf-75e1-48f2-8c07-b0e641f5bd05.png?resizew=197)
A.14cm | B.8cm | C.7cm | D.9cm |
21-22九年级上·江苏泰州·期中 查看更多[6]
江苏省泰州市泰兴市洋思中学、西城中学2021-2022学年九年级上学期期中数学试题山东省德州市陵城区2021-2022学年九年级上学期期末数学试题湖南省株洲市第二中学2021-2022学年九年级下学期数学开学测试题(已下线)24.2.4 切线长定理和三角形的内切圆(分层练习)-2022-2023学年九年级数学上册同步精品课堂(人教版)(已下线)(挑战压轴)专项2.3 三角形内心-2022-2023学年九年级数学下册《同步考点解读·专题训练》(浙教版)河南省濮阳市卫都实验学校2023-2024学年九年级上学期期中数学学业质量检测
更新时间:2022-01-21 23:00:05
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【知识点】 切线的性质和判定的综合应用解读
相似题推荐
单选题
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适中
(0.65)
【推荐1】已知,如图,在
中,
,以
为直径作
分别交
,
于
,
两点,过
点的切线交
的延长线于点
.下列结论:
①
;②两段劣弧
=
;③
与
相切;④
.
其中一定正确的有( )个.
![](https://img.xkw.com/dksih/QBM/2018/11/16/2076823211335680/2080121487597568/STEM/49c9374b8fe54ec6a100b127b0199dc4.png?resizew=94)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab41054fa9ce51b68e78d9c0cf398d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/598c4ff9fc8518fa4829e39254d3f6e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1fd9b03081c5af69378c75e2b8e56d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/785968ec05d2b748ccfc02accb75c7ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce49e1a4b9d205d62dfe8039d3d61ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faee0268e5ede6318697e5a8509dd6f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/680ff09c8fa0c6438e34eb1796914e22.png)
其中一定正确的有( )个.
![](https://img.xkw.com/dksih/QBM/2018/11/16/2076823211335680/2080121487597568/STEM/49c9374b8fe54ec6a100b127b0199dc4.png?resizew=94)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,半径为
的
与含有
角的直角三角板
的边
切于点
,将直角三角板沿
边所在的直线向左平移,当平移到
与
相切时,该直角三角板平移的距离为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/19/aa818df0-fd22-4eda-a45a-64c3c996bca5.png?resizew=186)
A.![]() | B.![]() | C.![]() | D.![]() |
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