如下图,已知
是圆的两条弦,过
作圆的切线与
的延长线相交于
.过点
作
的平行线与
相交于点
,
,
,则
的长为
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573019206893568/1573019212759040/STEM/410e88edaa704cc2aafa020fdab6d1ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573019206893568/1573019212759040/STEM/99198ee3d10f480f85e3e29e45fa6cf4.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573019206893568/1573019212759040/STEM/32035ab912c84b8b9e7fe9c883e90c05.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573019206893568/1573019212759040/STEM/ab11233fab80413ba5e967a2a9a0aabb.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573019206893568/1573019212759040/STEM/80aeba8fcc3a4b9da58bfcffc9f3050a.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573019206893568/1573019212759040/STEM/a58f6909945346bb9f1c33ecc27f950c.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573019206893568/1573019212759040/STEM/84b0c20104804ac8af472b87eb855dd3.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573019206893568/1573019212759040/STEM/b9a054c40a1d4558b17d652a983811d6.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573019206893568/1573019212759040/STEM/dc07eb9c046449df83bc74c7fabfd514.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573019206893568/1573019212759040/STEM/a09a8baf048d42ef8d3368f08005f7f6.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573019206893568/1573019212759040/STEM/9073842f7bde4e699c4b966ce6e60794.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573019206893568/1573019212759040/STEM/410e88edaa704cc2aafa020fdab6d1ac.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2016-12-04 20:18:41
|
【知识点】 几何证明选讲
相似题推荐
单选题
|
适中
(0.65)
【推荐1】如图,
是
的角平分线,
,
分别是
和
的高,得到下列四个结论:
;
;
当
时,四边形
是正方形;
其中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/23/79d11a05-a930-4487-84d7-404a09506585.png?resizew=181)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/442774b9275a7e69ad8e43845a0617a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53e9ded7a7207739774429a6a8622143.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82e415812cca9545611c0faa0c01b1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f89deb952f57f4b3fa4887b098b7b91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48a61d8bedef61745ee4fd89a8c0c119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f406938646313cb78804e1095636c2b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/23/79d11a05-a930-4487-84d7-404a09506585.png?resizew=181)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.64)
【推荐2】如图,
是⊙
的直径,
是弦,
的平分线
交⊙
于点
,
,交
的延长线于点
,
于点
,且
,
.在上述条件下,给出下列四个结论:①
;②
;③
;④
,则所有正确结论的序号是
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572687924682752/1572687930515456/STEM/40635dc1b2604642973861c77bec8d10.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572687924682752/1572687930515456/STEM/8bf08d3d2ff04ef7aef0340295b3d24a.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572687924682752/1572687930515456/STEM/c33e38cc9b2f4bbaaab64f951be7fb8a.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572687924682752/1572687930515456/STEM/bd61053a442246b8a9086797c4b70207.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572687924682752/1572687930515456/STEM/c667b30a8ffd42e0b19f12f8618df84e.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572687924682752/1572687930515456/STEM/fdf87f0713b5483e8a522a430d8b63a4.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572687924682752/1572687930515456/STEM/c33e38cc9b2f4bbaaab64f951be7fb8a.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572687924682752/1572687930515456/STEM/aed21a018dfc4fcd9be453141b576818.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572687924682752/1572687930515456/STEM/49a703a9467d49ca99ce9cece0afea44.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572687924682752/1572687930515456/STEM/bd61053a442246b8a9086797c4b70207.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572687924682752/1572687930515456/STEM/f5e534592a264505b51564c31c90b6e6.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572687924682752/1572687930515456/STEM/d1b16a0103214939b3544992ed950b10.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572687924682752/1572687930515456/STEM/353df585f85843cbbe82c5c74e8bd77f.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572687924682752/1572687930515456/STEM/5297c6673c15499fb50ea36cb67f9605.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572687924682752/1572687930515456/STEM/ff99e92ba9d9443b8899f13b4efdc1bd.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572687924682752/1572687930515456/STEM/54c0b01c3d2147948c39132e1c0aab40.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572687924682752/1572687930515456/STEM/d2d74b3421494a8b890247194e2ef715.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572687924682752/1572687930515456/STEM/f4df0f9053cb4bb6a16b33ac8b004c5e.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572687924682752/1572687930515456/STEM/f76e40feeefa431d85918a37072decb6.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572687924682752/1572687930515456/STEM/40635dc1b2604642973861c77bec8d10.png)
A.①②③ | B.②③④ | C.①③④ | D.①②④ |
您最近一年使用:0次