真题
1 . 选修4—1:几何证明选讲 如图,直线AB为圆的切线,切点为B,点C在圆上,∠ABC的角平分线BE交圆于点E,DB垂直BE交圆于D.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/5365865e-1cc9-47a2-9e47-f3464ca9a3c5.png?resizew=160)
(Ⅰ)证明:DB=DC;
(Ⅱ)设圆的半径为1,BC=
,延长CE交AB于点F,求△BCF外接圆的半径.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/5365865e-1cc9-47a2-9e47-f3464ca9a3c5.png?resizew=160)
(Ⅰ)证明:DB=DC;
(Ⅱ)设圆的半径为1,BC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
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2019-01-30更新
|
3914次组卷
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12卷引用:2015届江西省吉安市第一中学高三上学期第二次阶段考试文科数学试卷
2015届江西省吉安市第一中学高三上学期第二次阶段考试文科数学试卷2013年全国普通高等学校招生统一考试理科数学(新课标1卷)2013年全国普通高等学校招生统一考试文科数学(新课标1卷)(已下线)2014年高考数学文二轮专题复习与测试选修4-1几何证明选讲练习卷(已下线)2014届甘肃省兰州一中高考模拟一理科数学试卷(已下线)2014届甘肃省兰州一中高考模拟一文科数学试卷2015届黑龙江省哈尔滨六中高三上学期期末考试理科数学试卷2015届陕西省西安长安区一中高三上学期第三次质检理科数学卷2015届陕西省西安长安区一中高三上学期第三次质检文科数学卷2016届甘肃省会宁县一中高三上第四次月考理科数学试卷2016届湖北省宜昌市一中高三上学期12月月考数学试卷河北省武邑中学2017届高三下学期第一次质检考试数学(文)试题
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2 . 在平面直角坐标系中,将曲线
上的每一个点的横坐标保持不变,纵坐标缩短为原来的
,得到曲线
,以坐标原点
为极点,
轴的正半轴为极轴,建立极坐标系,
的极坐标方程为
.
(1)求曲线
的参数方程;
(2)过原点
且关于
轴对称的两条直线
与
分别交曲线
于
和
,且点
在第一象限,当四边形
周长最大时,求直线
的普通方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f917a2022014d9c19c29eeac84c74e2f.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)过原点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e478787ebfeb68a5a7594dbd9eecd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8f90eb172dbd2ff7ae6f705801c0737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
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2017-04-15更新
|
1238次组卷
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7卷引用:江西省南昌市四校联盟2019-2020学年高三第二次联考数学(文)试题
名校
3 . 如图,直线PQ与⊙O相切于点A,AB是⊙O的弦,∠PAB的平分线AC交⊙O于点C,连结CB,并延长与直线PQ相交于点Q,若AQ=6,AC=5.
![](https://img.xkw.com/dksih/QBM/2016/4/28/1572607145648128/1572607151489024/STEM/0359539e1f0c4416859950790998664e.png)
(Ⅰ)求证:QC2﹣QA2=BC
QC;
(Ⅱ)求弦AB的长.
![](https://img.xkw.com/dksih/QBM/2016/4/28/1572607145648128/1572607151489024/STEM/0359539e1f0c4416859950790998664e.png)
(Ⅰ)求证:QC2﹣QA2=BC
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b18d78c40ce368f60208949c5ae3fb.png)
(Ⅱ)求弦AB的长.
您最近一年使用:0次
2016-12-04更新
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507次组卷
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3卷引用:2016届江西省上高二中高三第七次月考文科数学试卷
4 . 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)
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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
5 . 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
6 . 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
7 . 如图,AB是⊙O的直径,AC是⊙O的切线,BC交⊙O于点E.
![](https://img.xkw.com/dksih/QBM/2016/4/19/1572597104369664/1572597110833152/STEM/3c3d5f0111da442e863aae870e774ef1.png)
(Ⅰ)若D为AC的中点,证明:DE是⊙O的切线;
(Ⅱ)若OA=
CE,求∠ACB的大小.
![](https://img.xkw.com/dksih/QBM/2016/4/19/1572597104369664/1572597110833152/STEM/3c3d5f0111da442e863aae870e774ef1.png)
(Ⅰ)若D为AC的中点,证明:DE是⊙O的切线;
(Ⅱ)若OA=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
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8 . 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)
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9 . 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
10 . 如图所示,
为
的直径,
为
的中点,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2016/4/28/1572606939684864/1572606946131968/STEM/0f36bdb6092143fdbd45e998e383d0df.png)
(1)求证:
;
(2)求证:
.
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2016/4/28/1572606939684864/1572606946131968/STEM/a574bb09e86c4f8595213823afe10cd7.png)
![](https://img.xkw.com/dksih/QBM/2016/4/28/1572606939684864/1572606946131968/STEM/f857367adba94f559aa6c6a3f7d5b434.png)
![](https://img.xkw.com/dksih/QBM/2016/4/28/1572606939684864/1572606946131968/STEM/0f36bdb6092143fdbd45e998e383d0df.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2016/4/28/1572606939684864/1572606946131968/STEM/7b97f5a3ed28437fa31c23ff15ad4d14.png)
(2)求证:
![](https://img.xkw.com/dksih/QBM/2016/4/28/1572606939684864/1572606946131968/STEM/3b32ae06b8ad4a0dbe3dd7e6bee001ab.png)
您最近一年使用:0次