2011·黑龙江·一模
1 . 选修4-1:几何证明选讲
如图,直线
经过圆
上的点
,并且
圆
交直线
于
,
,连接
.
(Ⅰ)求证:直线
圆
的切线;
(Ⅱ)若
,圆
的半径为3,求
的长.
如图,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/6b9ea5432b5b54aa784e976b3312f47c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a63295afb045510843bf4dd8d8fce0.png)
(Ⅰ)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/219a483b5834a9d8d6bd00fd0458ab01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://img.xkw.com/dksih/QBM/2011/3/16/1570042684358656/1570042689593344/STEM/5be781be9a944b2dac9aa26efff3549a.png?resizew=182)
您最近一年使用:0次
2016-11-30更新
|
1052次组卷
|
5卷引用:2011届黑龙江省哈三中等四校高三第一次模拟考试数学理卷
(已下线)2011届黑龙江省哈三中等四校高三第一次模拟考试数学理卷(已下线)2011届黑龙江省哈三中高三第一次模拟考试数学理卷(已下线)2012届辽宁省本溪一中、庄河高中高三上学期期末理科数学2014-2015学年河南省确山县二中高二4月月考文科数学试卷2016届吉林省吉林大学附中高三上第四次摸底文科数学试卷
2 . 选修4-1:几何证明选讲
如下图,四边形
内接于
,过点
作
的切线
交
的延长线于
,已知
.
![](https://img.xkw.com/dksih/QBM/2016/12/1/1573190598074368/1573190603907072/STEM/413d671276e44bc9a7ba456eae9ad2ce.png)
(Ⅰ)若
是
的直径,求
的大小;
(Ⅱ)若
,求证:
.
如下图,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a2ce04e29ecab05af9c8d1b4c81d516.png)
![](https://img.xkw.com/dksih/QBM/2016/12/1/1573190598074368/1573190603907072/STEM/413d671276e44bc9a7ba456eae9ad2ce.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/001fb1746a5c0d71c5d645e024fa8b3e.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4ca81d66713ac3f0dcc6b1b3209b76e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbbe3f5c93f7c60104ca98978d5a3f45.png)
您最近一年使用:0次
3 . 几何证明选讲
如图,
是圆
的直径,
,且
.
![](https://img.xkw.com/dksih/QBM/2016/11/24/1573174795157504/1573174801285120/STEM/d85c2bc295d14f8abfd2a8c19df5c8d5.png)
(1)求证:
;
(2)求
的值.
如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f155d0eacbae1e6c11d8558f91955df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f31dfadd380250b6797c7f79c9eccd.png)
![](https://img.xkw.com/dksih/QBM/2016/11/24/1573174795157504/1573174801285120/STEM/d85c2bc295d14f8abfd2a8c19df5c8d5.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/492b5aafdee54f6891ff92ef43678b1d.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
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4 . 选修4-1:几何证明选讲
如图,已知
是圆
的直径,直线
与圆
相切于点
,弦
的延长线交
于点
,若
.
![](https://img.xkw.com/dksih/QBM/2016/11/9/1573134191722496/1573134197751808/STEM/b713a6ec72c844b8b6a3c8b717ed886a.png)
(1)求证:
;
(2)若
,求
的长.
如图,已知
![](https://img.xkw.com/dksih/QBM/2016/11/9/1573134191722496/1573134197751808/STEM/042fd3ef9f594f32a83fdd68d7551d26.png)
![](https://img.xkw.com/dksih/QBM/2016/11/9/1573134191722496/1573134197751808/STEM/65ef5b05f2c9405fa299a0171bb54946.png)
![](https://img.xkw.com/dksih/QBM/2016/11/9/1573134191722496/1573134197751808/STEM/f7295fa847044b3491efc4855658bcbc.png)
![](https://img.xkw.com/dksih/QBM/2016/11/9/1573134191722496/1573134197751808/STEM/65ef5b05f2c9405fa299a0171bb54946.png)
![](https://img.xkw.com/dksih/QBM/2016/11/9/1573134191722496/1573134197751808/STEM/8d7ea70146f9455cb69b3b2a027eb17b.png)
![](https://img.xkw.com/dksih/QBM/2016/11/9/1573134191722496/1573134197751808/STEM/a21a70b48b4d4667882c4f75bfbb925b.png)
![](https://img.xkw.com/dksih/QBM/2016/11/9/1573134191722496/1573134197751808/STEM/f7295fa847044b3491efc4855658bcbc.png)
![](https://img.xkw.com/dksih/QBM/2016/11/9/1573134191722496/1573134197751808/STEM/768533cc87644e0a8051f67ccee2cae8.png)
![](https://img.xkw.com/dksih/QBM/2016/11/9/1573134191722496/1573134197751808/STEM/a687acef66324117b22f723b21e5711d.png)
![](https://img.xkw.com/dksih/QBM/2016/11/9/1573134191722496/1573134197751808/STEM/b713a6ec72c844b8b6a3c8b717ed886a.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2016/11/9/1573134191722496/1573134197751808/STEM/851972b7f1264771b091df44f9b3d5be.png)
(2)若
![](https://img.xkw.com/dksih/QBM/2016/11/9/1573134191722496/1573134197751808/STEM/e28b89ab27f6440a82f71840c417244d.png)
![](https://img.xkw.com/dksih/QBM/2016/11/9/1573134191722496/1573134197751808/STEM/87c70674ae4a405a96994c63081fa409.png)
您最近一年使用:0次
2016-12-05更新
|
84次组卷
|
2卷引用:2017届云南曲靖一中高三上月考二数学(理)试卷
5 . 选修4-1:几何证明选讲
如图,
是
的直径,
为
的切线,点
为
上不同于
、
的一点,
为
的平分线,且分别与
交于
,与
交于
,与
交于
,连接
、
.
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573118771642368/1573118777868288/STEM/f733e75dc7ad4d0f9e3fc0098f87da84.png)
(Ⅰ)求证:
;
(Ⅱ)求证:
.
如图,
![](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/85c4bdfb0db1e31e8459df1d15f9ab55.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/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](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/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573118771642368/1573118777868288/STEM/f733e75dc7ad4d0f9e3fc0098f87da84.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9161ed2efa3bc2130a7ce88161c72c1c.png)
(Ⅱ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eddc2ca8b661465c6896ba52c2a7905e.png)
您最近一年使用:0次
2016-12-04更新
|
106次组卷
|
2卷引用:2017届辽宁庄河市高级中学高三9月月考数学(理)试卷
6 . 如图,直线
与圆切于点
,过
作直线与圆交于
两点,点
在圆上,且
.
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573111429447680/1573111435993088/STEM/f90ae4f52cef411aa76787b279f46c88.png?resizew=185)
(1)求证:
;
(2)若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b70faeb8cf6c8bdb9aab3a006b4c974.png)
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573111429447680/1573111435993088/STEM/f90ae4f52cef411aa76787b279f46c88.png?resizew=185)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0debf7dd6e6a8fd14253cb1a4a3bc59.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8edaed541a0f4ec6c8c7f22f37639796.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e0a538a73dd30cfcb47455e37bfb4cc.png)
您最近一年使用:0次
2016-12-04更新
|
390次组卷
|
5卷引用:2017届山西临汾一中高三10月月考数学(理)试卷
7 . 选修4-1:几何证明选讲
如图,过圆
外一点
作一条直线与圆
交
两点,且
,作直线
与圆
相切于点
,连接
交
与点
,已知圆
的半径为2,
.
![](https://img.xkw.com/dksih/QBM/2016/10/31/1573102947753984/1573102953791488/STEM/265bd159d0374fecac19a6bd9be20eaa.png)
(1)求
的长;
(2)求证:
.
如图,过圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70e6f98369bdaa02ee8e8685f8f23d67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e390480dce825d6302a5223cd073d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.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/49b50357a6545cae8348e3059312f520.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a3b32f1db027d67ed28e5b2113e79d.png)
![](https://img.xkw.com/dksih/QBM/2016/10/31/1573102947753984/1573102953791488/STEM/265bd159d0374fecac19a6bd9be20eaa.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d315eff37c1bdf5be90b6015b08bdea.png)
您最近一年使用:0次
8 . 选修4-1:几何证明选讲
如图,圆周角
的平分线与圆交于点
,过点
的切线与弦
的延长线交于点
,
交
于点
.
![](https://img.xkw.com/dksih/QBM/2015/10/28/1572273014292480/1572273020624896/STEM/250ee19ea09e4222bacc8433628290df.png)
(1)求证:
;
(2)若
,
,
,
四点共圆,且
,求
.
如图,圆周角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e57541260bfadf7624c86769eec0fc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f0b669ef4514f24ee09adeff7f41238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f0b669ef4514f24ee09adeff7f41238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9febb0e53890d2fb72fdfd7f0aa88acc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ebbd866e455cf80ea669c9f56f792c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b693717f525facc79b9a500ed998b109.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/588a2119bc5e8cdf4731828b195a7892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2391c0e2fc44598610d519dacb778062.png)
![](https://img.xkw.com/dksih/QBM/2015/10/28/1572273014292480/1572273020624896/STEM/250ee19ea09e4222bacc8433628290df.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baa9132693acc1c5c9f9b50445cf98e2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f0b669ef4514f24ee09adeff7f41238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ebbd866e455cf80ea669c9f56f792c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca66a268d6f46e0e9d5d9151b785be60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2391c0e2fc44598610d519dacb778062.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14da8b9947feb556eb2669fcb6ba6277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e57541260bfadf7624c86769eec0fc1.png)
您最近一年使用:0次
2016-12-04更新
|
90次组卷
|
3卷引用:2016届吉林省实验中学高三上学期第一次模拟理科数学试卷1
2010·辽宁·一模
9 . 选修4-1:几何证明选讲
如图所示,已知PA与⊙O相切,A为切点,PBC为割线,弦CD∥AP,AD、BC相交于E点,F为CE上一点,且DE2=EF·EC.
![](https://img.xkw.com/dksih/QBM/2011/9/9/1570307677011968/1570307682656256/STEM/253247442818499499074f567058fd80.png)
(1)求证:ÐP=ÐEDF;
(2)求证:CE·EB=EF·EP.
如图所示,已知PA与⊙O相切,A为切点,PBC为割线,弦CD∥AP,AD、BC相交于E点,F为CE上一点,且DE2=EF·EC.
![](https://img.xkw.com/dksih/QBM/2011/9/9/1570307677011968/1570307682656256/STEM/253247442818499499074f567058fd80.png)
(1)求证:ÐP=ÐEDF;
(2)求证:CE·EB=EF·EP.
您最近一年使用:0次
2016-12-04更新
|
97次组卷
|
3卷引用:2011年辽宁名校领航高考预测试(五)数学卷
10 . 如图,AB为圆O的一条弦,C为圆O外一点.CA,CB分别交圆O于D,E两点.
若AB=AC,EF⊥AC于点F,求证:F为线段DC的中点.
若AB=AC,EF⊥AC于点F,求证:F为线段DC的中点.
![](https://img.xkw.com/dksih/QBM/2016/9/19/1573030156165120/1573030162391040/STEM/4d063dc8c2b74bc6bbd8857b562d1ea8.png)
您最近一年使用:0次