自圆
外一点
引圆
的两条割线
和
,如图所示,其中割线
过圆心
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/ef6942b7-ec55-4a78-a65b-b14c8084a08d.png?resizew=208)
(1)求
的大小;
(2)分别求线段
和
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54d87077425ae6016e8a7cc7293c91fe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/ef6942b7-ec55-4a78-a65b-b14c8084a08d.png?resizew=208)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
(2)分别求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
更新时间:2016-12-03 19:12:39
|
【知识点】 几何证明选讲
相似题推荐
解答题-证明题
|
较易
(0.85)
【推荐1】选修4-1:几何证明选讲
如图,
是
的切线,
是
的割线,
,连接
,分别与
交于点
,点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/7/5e663624-5f37-48fb-9fbc-686ec3d12bfd.png?resizew=208)
(Ⅰ)求证:
;
(Ⅱ)求证:
.
如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d384390f4e0a1e0abd4cc19382d94db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55f18975e22970b8fde117a588d9b681.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/7/5e663624-5f37-48fb-9fbc-686ec3d12bfd.png?resizew=208)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58881f93abe2bd9a89947a56c3a1dc8e.png)
(Ⅱ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eb7a1490c92f6a07cae398ea79bddf4.png)
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
【推荐2】[选修4—1:几何证明选讲]
如图,ABCD为圆内接四边形,延长两组对边分别交于点E,F.M,N为AB,CD上两点,EM=EN,点F在MN的延长线上.求证:∠BFM=∠AFM.
如图,ABCD为圆内接四边形,延长两组对边分别交于点E,F.M,N为AB,CD上两点,EM=EN,点F在MN的延长线上.求证:∠BFM=∠AFM.
![](https://img.xkw.com/dksih/QBM/2018/5/25/1953107742081024/2007656974417920/STEM/eface4f75c1b437fb58753f845e89d4c.png?resizew=164)
您最近一年使用:0次