已知
中,
为
外接圆劣弧
上的点(不与点
.
重合),延长
,延长
的延长线于
.
![](https://img.xkw.com/dksih/QBM/2016/1/11/1572426471907328/1572426477805568/STEM/1eb8de7db98042bbaccaa468723f953e.png)
(1)求证:
;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90dc865781ebfe38b4a75d5184a8956.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e262f59351803e420bf1226c95e4bba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b6a6b40f29f5081dff13c100583d9b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0804964ed20d4b476d76f2ca43f1ded.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2016/1/11/1572426471907328/1572426477805568/STEM/1eb8de7db98042bbaccaa468723f953e.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2016/1/11/1572426471907328/1572426477805568/STEM/918fd0912a144183ac5588eeeaf3c149.png)
(2)求证:
![](https://img.xkw.com/dksih/QBM/2016/1/11/1572426471907328/1572426477805568/STEM/832e390885954e26aa0991137f3a35db.png)
更新时间:2016-12-04 00:12:46
|
【知识点】 几何证明选讲
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】已知四边形
为圆
的内接四边形,且
,
切圆
于点
且交
的延长线于点
.
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572926695251968/1572926701780992/STEM/d8b368a88d8c470abce08073c93a749c.png?resizew=203)
(1)求证:
;
(2)若
,
,
,试求圆
的半径的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/325d00656ae1b8d8923ec53b426d22b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/236abcd5701f3d6d512f022a0f5abc9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572926695251968/1572926701780992/STEM/d8b368a88d8c470abce08073c93a749c.png?resizew=203)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e839007f29f4c72dfd700292ceb8802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/348513d257538d4dd1b400987b623256.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7809143e0e8692d6d4058891bf02559f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.64)
【推荐2】如图,已知
是
的直径,
是
的切线,
交
于点
.
![](https://img.xkw.com/dksih/QBM/2016/5/9/1572623538077696/1572623543812096/STEM/01572ea7ebd74b148462dc0d522c9dcc.png)
(1)若D为AC的中点,证明:DE是
的切线;
(2)若
,求
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03fcb360984721a5600d426949ccdb14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61588617d22abd00af4ca489bb3a8787.png)
![](https://img.xkw.com/dksih/QBM/2016/5/9/1572623538077696/1572623543812096/STEM/01572ea7ebd74b148462dc0d522c9dcc.png)
(1)若D为AC的中点,证明:DE是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
(2)若
![](https://img.xkw.com/dksih/QBM/2016/5/9/1572623538077696/1572623543812096/STEM/db1ad4888d314d4caba6ca54b7d5b85e.png)
![](https://img.xkw.com/dksih/QBM/2016/5/9/1572623538077696/1572623543812096/STEM/dd3fc57e1ab14acc831a0a7095880ae1.png)
您最近一年使用:0次