1 . 选修4-1:几何证明选讲
如图,已知
与圆
相切,
为切点,
为割线,弦
,
相交于
点,
为
上一点,且
.
![](https://img.xkw.com/dksih/QBM/2016/9/12/1573014847234048/1573014853287936/STEM/7a652be337cc4d25a7aab4a6d67b6a64.png)
(1)求证:
四点共圆;
(2)若
,
,求
的长.
如图,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a41bcbf7a137218daf88f1deddd2adc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d93949d8a15aca4e79cedb978590571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/994e2fc5676a42e4edba54a291236d7c.png)
![](https://img.xkw.com/dksih/QBM/2016/9/12/1573014847234048/1573014853287936/STEM/7a652be337cc4d25a7aab4a6d67b6a64.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21a511ffe1a6617f45c48748a16372cd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a5a0689f27f06ebd8468e4a5cbab799.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034a9d2e093d0040c609450c3a344cca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
您最近一年使用:0次
2 . 选修4-1:几何证明选讲
如图,
的外接圆为⊙
,延长
至
,再延长
至
,使得
成为
,
的等比中项.
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573005992738816/1573005998833664/STEM/afe72850fd8b4cefba8a1d18eb32eaa0.png)
(1)求证:
为⊙
的切线;
(2)若
恰好为
的平分线,
,
,求
的长度.
如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf25e032b5599ac49383de06e776365.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf25e032b5599ac49383de06e776365.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/350e954f629c1901a5cec03558319e46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf702adb116c1e46569eb7050d029f49.png)
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573005992738816/1573005998833664/STEM/afe72850fd8b4cefba8a1d18eb32eaa0.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf25e032b5599ac49383de06e776365.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ab1b4d52dc296acb2764f333bd4343f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf25e032b5599ac49383de06e776365.png)
您最近一年使用:0次
3 . 选修4—1几何证明选讲
如图,已知直线
与圆
切于点
,直线
过圆心
,且与圆
交于点
,若
.
![](https://img.xkw.com/dksih/QBM/2016/8/3/1572946486329344/1572946492702720/STEM/d89f0928436c4399bf3741489684cdd9.png)
(1)求
的大小;
(2)若
的平分线与
交于点
,与圆
的另一个交点为
,求
.
如图,已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/535a43e386263720545413ced24dd9c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ae9840f36e04cac85f07c3627afc9c2.png)
![](https://img.xkw.com/dksih/QBM/2016/8/3/1572946486329344/1572946492702720/STEM/d89f0928436c4399bf3741489684cdd9.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f2025e548509be905d2777f4479f195.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6062582a0a1679aa777451f25008411d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47050d71aa1c86a620646c6860a96e90.png)
您最近一年使用:0次
4 . 选修4-1:几何证明选讲
如图,
是圆内两条弦
和
的交点,
为
延长线上一点,
切圆于点
,且
.
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573076038017024/1573076043538432/STEM/8a3e0954778f4d1fb2cd193fbfecb975.png)
(1)证明:
;
(2)若
,
,求
.
如图,
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573076038017024/1573076043538432/STEM/719cf56b60144f1d93682cefa8344e9e.png)
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573076038017024/1573076043538432/STEM/b4a7524c22c54458920c37327fbc7562.png)
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573076038017024/1573076043538432/STEM/e3c6f18fdd4e4f059e816de4cf269862.png)
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573076038017024/1573076043538432/STEM/12897b0cf97d4a7681225ebe881acaa0.png)
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573076038017024/1573076043538432/STEM/8e38e3832dc8441abf2c3eb9b2dbdd57.png)
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573076038017024/1573076043538432/STEM/2f2064d4cc844bcf8ac0eab6c30b379b.png)
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573076038017024/1573076043538432/STEM/6700dc83914a4b72885c3e77e4727eae.png)
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573076038017024/1573076043538432/STEM/a788381e6aa647e28a728dc828aae645.png)
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573076038017024/1573076043538432/STEM/8a3e0954778f4d1fb2cd193fbfecb975.png)
(1)证明:
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573076038017024/1573076043538432/STEM/0334e2c47f5b471d96db97e95a2f8896.png)
(2)若
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573076038017024/1573076043538432/STEM/20901478ab9049c092bc324bb074aaa8.png)
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573076038017024/1573076043538432/STEM/56f1d3c83da044378bad84640bc454de.png)
![](https://img.xkw.com/dksih/QBM/2016/10/18/1573076038017024/1573076043538432/STEM/e4884a9c00554d7eb9d8e7ac2f1299dd.png)
您最近一年使用:0次
5 . 选修4-1:几何证明选讲
如图,直线
与
相切于点
,
是
的弦,
的平分线
交
于点
,连结
,并延长与直线
相交于点
,若
,
.
![](https://img.xkw.com/dksih/QBM/2016/1/4/1572413164535808/1572413170311168/STEM/d3534f6eedf44e80a31ce4dbecbfaafd.png)
(1)求证:
;
(2)求弦
的长.
如图,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6b8df24075e4eafe91ce9b5a4195d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2335610d92b3b6cddc6460ffd3af7a54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aa5694373bd78b1ca2180f831bf1c8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d86a0a3e867a448094f74a54a1fee64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2335610d92b3b6cddc6460ffd3af7a54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31050fa2315bc1174bfed74c2eedb6bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9febb0e53890d2fb72fdfd7f0aa88acc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2335610d92b3b6cddc6460ffd3af7a54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca66a268d6f46e0e9d5d9151b785be60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85a5f897c14c15e6c2edb67ed035f7f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6b8df24075e4eafe91ce9b5a4195d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316ecb1589c3cc179e2f62507020771e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59bc7efacae16c48593c99afc4b8ee7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47b067abe01256d1ad644907067ca6b0.png)
![](https://img.xkw.com/dksih/QBM/2016/1/4/1572413164535808/1572413170311168/STEM/d3534f6eedf44e80a31ce4dbecbfaafd.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29d633e6dd7216e98ca234a937608df4.png)
(2)求弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d86a0a3e867a448094f74a54a1fee64.png)
您最近一年使用:0次
2016-12-03更新
|
570次组卷
|
2卷引用:2015届江西省高安中学高三命题中心模拟押题一文科数学试卷
6 . 如图, AB是圆O的直径,G是AB延长线上的一点,GCD是⊙O的割线,过点G作AG的垂线,交直线AC于点E,交直线AD于点F,过点G作圆O的切线,切点为H.
![](https://img.xkw.com/dksih/QBM/2015/6/10/1572121469919232/1572121476079616/STEM/c4815a07cbfd4097b664c0ac78a7a9b2.png?resizew=189)
(1)求证:C,D,E,F四点共圆;
(2)若GH=6,GE=4,求EF的长.
![](https://img.xkw.com/dksih/QBM/2015/6/10/1572121469919232/1572121476079616/STEM/c4815a07cbfd4097b664c0ac78a7a9b2.png?resizew=189)
(1)求证:C,D,E,F四点共圆;
(2)若GH=6,GE=4,求EF的长.
您最近一年使用:0次
7 . 选修4—1:几何证明选讲
如图,已知
是
的直径,
是
的切线,
为切点,
,交
于点
,连接
、
、
、
,延长
交
于
.
![](https://img.xkw.com/dksih/QBM/2015/3/30/1572048932945920/1572048938811392/STEM/600be9395db149a7b3a5b81698db52d6.png)
(1)证明:
;
(2)证明:
.
如图,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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96dae94a9c26b6dd1dbcdebd20373033.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2015/3/30/1572048932945920/1572048938811392/STEM/600be9395db149a7b3a5b81698db52d6.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddc7897e3f49075943704f4dbef82e5b.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bfda305b29f8d317661772153315d1f.png)
您最近一年使用:0次
2016-12-03更新
|
481次组卷
|
2卷引用:2015届江西省九江市第一次高考模拟统一考试理科数学试卷