名校
1 . 如图,在圆内接四边形
中,
,
,
.
![](https://img.xkw.com/dksih/QBM/2018/4/16/1925091064176640/1927240651849728/STEM/650e0052-8337-4afc-aacd-d76868387aeb.png)
(1)求
的大小;
(2)求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8de006cef9e5efbcbf74229845804650.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf7679c8b4b1e442ce4286d4b0e9c32.png)
![](https://img.xkw.com/dksih/QBM/2018/4/16/1925091064176640/1927240651849728/STEM/650e0052-8337-4afc-aacd-d76868387aeb.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727ad3e630a224303d6d3b8ad5c114ba.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df6d51738ac1bc8b9530ea4a55745c2.png)
您最近一年使用:0次
2018-04-19更新
|
153次组卷
|
2卷引用:2018年陕西省咸阳市第二次模拟理数试题
2 . 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
3 . 选修4-1:几何证明选讲
如图,弦
与
相交于圆
内一点
,过
作
的平行线与
的延长线交于点
,且
.
![](https://img.xkw.com/dksih/QBM/2016/10/14/1573070185062400/1573070191312896/STEM/2f535e00e20e402fa2876f10f940d461.png)
(1)求证:
;
(2)若
,求
长.
如图,弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d86a0a3e867a448094f74a54a1fee64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a44be92f38e063a01b8cd67418815cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81574a3738c0a314293ff7c74248971.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ebbd866e455cf80ea669c9f56f792c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ebbd866e455cf80ea669c9f56f792c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/588a2119bc5e8cdf4731828b195a7892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b693717f525facc79b9a500ed998b109.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ab653ffa6acf8b28096ff54719579d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdb7ed0b94d3ad3ee9de3d639fd46e70.png)
![](https://img.xkw.com/dksih/QBM/2016/10/14/1573070185062400/1573070191312896/STEM/2f535e00e20e402fa2876f10f940d461.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e95b518bd7489451988595ff806b58af.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4023974aa3cdda838ebb84f467ab3456.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6321b1b15b47a98a86268229633daf77.png)
您最近一年使用:0次
2016-12-04更新
|
97次组卷
|
2卷引用:2016届陕西省高三高考全真模拟(五)考试数学(理)试卷
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
2014·陕西西安·二模
6 . 如图,已知
是⊙
的切线,
为切点.
是⊙
的一条割线,交⊙
于
两点,点
是弦
的中点.若圆心
在
内部,则
的度数为___ .
![](https://img.xkw.com/dksih/QBM/2014/4/21/1571634623266816/1571634628968448/STEM/dc2c623e9f514c12b26cbd3e10635e33.png?resizew=25)
![](https://img.xkw.com/dksih/QBM/2014/4/21/1571634623266816/1571634628968448/STEM/1c93968b41b14eb092aecf1c08ad491a.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2014/4/21/1571634623266816/1571634628968448/STEM/f05cff5034bb4bc5b0c6296312c8925f.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2014/4/21/1571634623266816/1571634628968448/STEM/7926af17c7254dd1b717ccda7ced5f31.png?resizew=27)
![](https://img.xkw.com/dksih/QBM/2014/4/21/1571634623266816/1571634628968448/STEM/1c93968b41b14eb092aecf1c08ad491a.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2014/4/21/1571634623266816/1571634628968448/STEM/1c93968b41b14eb092aecf1c08ad491a.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2014/4/21/1571634623266816/1571634628968448/STEM/bd96b51f9d4b4e54a44de6d907bc796e.png?resizew=32)
![](https://img.xkw.com/dksih/QBM/2014/4/21/1571634623266816/1571634628968448/STEM/f1cb61b13f11474b8ac9b2dcd62dcc25.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2014/4/21/1571634623266816/1571634628968448/STEM/4440292c3d6c42249529d95b2338a56e.png?resizew=27)
![](https://img.xkw.com/dksih/QBM/2014/4/21/1571634623266816/1571634628968448/STEM/1c93968b41b14eb092aecf1c08ad491a.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2014/4/21/1571634623266816/1571634628968448/STEM/cf31fc268e334188af220993f5a147d0.png?resizew=47)
![](https://img.xkw.com/dksih/QBM/2014/4/21/1571634623266816/1571634628968448/STEM/26aa5cccab58497baf6d017b3a5498ab.png?resizew=109)
![](https://img.xkw.com/dksih/QBM/2014/4/21/1571634412396544/1571634417868800/STEM/4e48942e-4f0d-49af-99c6-ca1b5379ef7e.png?resizew=285)
您最近一年使用:0次