如图,在
中,已知
,
,
,
为内角平分线,以
为弦作一个圆与
相切,且与
、
分别交与点
、
.求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d649afbddd907f0dfec1420f02f82fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f186ea827f7becafd1ac4955e22c6812.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/9224249e-f2b3-4b3d-b1f1-4e83c0734354.png?resizew=149)
2010高一·河南·竞赛 查看更多[1]
(已下线)2010年全国高中数学联赛河南省预赛(高一)试题
更新时间:2018-12-25 19:56:38
|
【知识点】 纯几何方法
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在以线段
为直径的
内有一点
,
,
与
的延长线与
分别交于点
、
,
和
的角平分线交于点
.求证:
的外接圆与
的外接圆异于点
的那个交点必在边
上.
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6eab933fd3ed8a3a412a6f268d4cef4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358c69b4f6c350c35d19d33c69f2a2a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ad365575c3a6e7d8ef759569d5be5f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81df727d59e5a6c4df2fd32925527924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/18aa0fe0-b070-4f75-89c7-70d5e147064f.png?resizew=169)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图所示,延长凸五边形
的各边,在它的外部得五个三角形:
,
,
,
,
.
求证:这五个三角形外接圆的五个交点
、
、
、
、
在同一圆上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5666c09fdd41cf808379debef9d3a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6247aa327340f84ce31f93e32cf543b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6d2f4db8959ab327e59518532da3f5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a3df2a450ae527f5ffe44035a2c2c18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f383662516f6900bdbed7ef64bd17ec7.png)
求证:这五个三角形外接圆的五个交点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/522230546d4b802094e86ceb48c2ba38.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/ac0e9cd8-f870-4e49-84aa-7ab886009b06.png?resizew=208)
您最近一年使用:0次