10-11高二下·海南·期末
1 . 如图:
为
的外接圆,
,过点
的直线交
于
,交
延长线于
,
是
的延长线,连接
.
![](https://img.xkw.com/dksih/QBM/2011/4/18/1570122042114048/1570122047381504/STEM/4477dad8d0c549489597dd2fee3dbd7f.png?resizew=180)
① 求证:
;
②求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/2011/4/18/1570122042114048/1570122047381504/STEM/4477dad8d0c549489597dd2fee3dbd7f.png?resizew=180)
① 求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14072216fabe3e325e8f0da087239b1e.png)
②求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/607b3dca43bf4454f1ec2661f722f8f2.png)
您最近一年使用:0次
10-11高二下·海南·期末
2 . 如图,
切⊙O于点
为
的中点,过点
引割线交⊙O于
、
两点.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65436512ecbaefba4ac8123c55094211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35b1ffac8ffc5f37b96668839083a2b6.png)
![](https://img.xkw.com/dksih/QBM/2011/7/26/1570273735401472/1570273740816384/STEM/8f89c817d214462e9ac15a700a62071f.png)
您最近一年使用:0次