图,
是△ABC的外接圆,点I是△ABC内心,连接AI并延长交⊙O于点D,若AB=9,BC=14,CA=13,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8f8d839fd689a2f96dd7698e7db1bfb.png)
A.![]() | B.![]() | C.![]() | D.![]() |
2022·湖北武汉·模拟预测 查看更多[3]
2022年湖北省武汉二中广雅中学九年级数学课堂作业试题(已下线)第二节 与切线有关的证明与计算01技法提练(已下线)热点08 圆(13大题型+满分技巧+限时分层检测)-2024年中考数学【热点·重点·难点】专练(广东专用)
更新时间:2022-05-15 16:47:43
|
相似题推荐
单选题
|
较易
(0.85)
名校
【推荐2】如图,△ABC为⊙O的内接三角形,AB为⊙O的直径,点D在⊙O上,∠ADC=54°,则∠BAC的度数等于( )
![](https://img.xkw.com/dksih/QBM/2019/1/3/2110856774664192/2113140421795840/STEM/2e453a3881b040abad3ec7ccd1b9fdbf.png?resizew=124)
![](https://img.xkw.com/dksih/QBM/2019/1/3/2110856774664192/2113140421795840/STEM/2e453a3881b040abad3ec7ccd1b9fdbf.png?resizew=124)
A.36° | B.44° | C.46° | D.54° |
您最近一年使用:0次
单选题
|
较易
(0.85)
【推荐1】在
中,
,
,
,
内切圆与外接圆面积之比为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dafddfd80f69337909f6eac0f0dbfd59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432043f79e122f291c47453013042704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
名校
【推荐2】如图,在△ABC中,分别以顶点A、B为圆心,大于
AB为半径作弧,两弧在直线AB两侧分别交于M、N两点,过M、N作直线MN,与AB交于点O,以O为圆心,OA为半径作圆,⊙O恰好经过点C.下列结论中,错误的是( )
![](https://img.xkw.com/dksih/QBM/2020/5/17/2464529208918016/2464903986348032/STEM/579ba0e4b34b4d9e83414e50e8b6996b.png?resizew=155)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/2020/5/17/2464529208918016/2464903986348032/STEM/579ba0e4b34b4d9e83414e50e8b6996b.png?resizew=155)
A.AB是⊙O的直径 | B.∠ACB=90° |
C.△ABC是⊙O内接三角形 | D.O是△ABC的内心 |
您最近一年使用:0次
单选题
|
较易
(0.85)
【推荐1】已知,在△ABC中,∠ACB=90°,CD⊥AB于D,若BC=5,CD=3,则AD的长为( )
A.2.25 | B.2.5 | C.2.75 | D.3 |
您最近一年使用:0次
单选题
|
较易
(0.85)
名校
【推荐2】如图,
为等边三角形,
,D在
边上,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2d40d5cb59338d3cb1dd504bb12d107.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5277fa450a0c513a86a74420f8ee99f6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/26/7c6da389-ecda-4ad9-93ed-9de2a8d65f2f.png?resizew=128)
A.![]() | B.![]() | C.3 | D.4 |
您最近一年使用:0次