1 . 选修4-1:几何证明选讲
已知:如图,在
中,
,以
为直径的
交
于点
,过点
作
,垂足为
,连结
交
于点
.求证:
![](https://img.xkw.com/dksih/QBM/2016/10/15/1573071473934336/1573071480078336/STEM/37ca4f1c9df9480da54a79ec9dbd72d3.png)
(Ⅰ)
是
的切线;
(Ⅱ)
.
已知:如图,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c9c90cfd058a3f1158b76f7e23819eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9eadc2feca23f49e36ade66f66512e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2016/10/15/1573071473934336/1573071480078336/STEM/37ca4f1c9df9480da54a79ec9dbd72d3.png)
(Ⅰ)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
(Ⅱ)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce78c2b25f0293eb4a3f54c4bb68e9f6.png)
您最近一年使用:0次
2 . 选修4-1:几何证明选讲
如图,已知圆
与
相交于
两点,过点
作圆
的切线交圆
于点
,过点
作两圆的割线,分别交圆
、圆
于点
、
,
与
相交于点
.
(Ⅰ)求证:
;
(Ⅱ)若
是圆
的切线,且
,求
的长.
如图,已知圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4f6f74444b2b7947fc6e35c8d62322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4f6f74444b2b7947fc6e35c8d62322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4f6f74444b2b7947fc6e35c8d62322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0283b4d5655575fa0c9a2a96d67cf99.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4f6f74444b2b7947fc6e35c8d62322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8b2e4d424dd04c5ed52385c0181e441.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/2016/9/1/1572995558965248/1572995565133824/STEM/cba92e08fe4f4dc896df78e0f5598a20.png)
您最近一年使用:0次
3 . 选修4-1:几何证明选讲
如下图,已知
为
的直径,
为
上的两点,
,过点
作
的切线
交
的
延长线于点
,连接
交
于点
.
求证:
.
如下图,已知
![](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/ea9aa3f533894ca87a394f7a1dfd0ea3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31f39fc480d6b8c9948dae17999f91ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
延长线于点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41db7de70cf9c8f98ca1d96bf658d3ef.png)
![](https://img.xkw.com/dksih/QBM/2016/9/1/1572995312599040/1572995319037952/STEM/184e1b25609e46a98527b8add134df79.png)
您最近一年使用:0次
4 . 选修4-1:几何证明选讲
如图所示,
是
的直径,
为
延长线上的一点,
是
的割线,过点
作
的垂线,交
的延长线于点
,交
的延长线于点
.求证:
![](https://img.xkw.com/dksih/QBM/2016/8/17/1572979903684608/1572979910057984/STEM/4c15bed67df84698a169278388ea534c.png)
(Ⅰ)
;
(Ⅱ)若
,求
.
如图所示,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2016/8/17/1572979903684608/1572979910057984/STEM/dc9ccddb0f05497ba403e5cf0277e4e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
![](https://img.xkw.com/dksih/QBM/2016/8/17/1572979903684608/1572979910057984/STEM/2e3d32c677944aef95a888bcdcb878a8.png)
![](https://img.xkw.com/dksih/QBM/2016/8/17/1572979903684608/1572979910057984/STEM/4c15bed67df84698a169278388ea534c.png)
(Ⅰ)
![](https://img.xkw.com/dksih/QBM/2016/8/17/1572979903684608/1572979910057984/STEM/c684d9a9f8cc49998be3f20c3200a07c.png)
(Ⅱ)若
![](https://img.xkw.com/dksih/QBM/2016/8/17/1572979903684608/1572979910057984/STEM/6f8ad711bf434f62917a29158d18e4a3.png)
![](https://img.xkw.com/dksih/QBM/2016/8/17/1572979903684608/1572979910057984/STEM/c1dbe7a441d2425f87dfec3c24df722b.png)
您最近一年使用:0次
2016-12-04更新
|
118次组卷
|
2卷引用:2016届陕西省黄陵中学高三下第六次模拟理科数学试卷
5 . 已知四边形ABCD内接于⊙O,AD:BC=1:2,BA、CD的延长线交于点E,且EF切⊙O于F.
![](https://img.xkw.com/dksih/QBM/2016/3/21/1572548471308288/1572548476837888/STEM/8d039d6541e14e05804034f21542a74e.png)
(Ⅰ)求证:EB=2ED;
(Ⅱ)若AB=2,CD=5,求EF的长.
![](https://img.xkw.com/dksih/QBM/2016/3/21/1572548471308288/1572548476837888/STEM/8d039d6541e14e05804034f21542a74e.png)
(Ⅰ)求证:EB=2ED;
(Ⅱ)若AB=2,CD=5,求EF的长.
您最近一年使用:0次
2016-12-04更新
|
279次组卷
|
2卷引用:2016届陕西省西安市一中高三下学期第一次模拟理科数学试卷