1 . 选修4-1:几何证明选讲
如图,在⊙
的直径
的延长线上取点
,作⊙
的切线
,
为切点,在
上找一点
,使
,连接
并延长交⊙
于点
.
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573017246253056/1573017252708352/STEM/db76e342dddd4f21a0e18f6effa2ccd4.png)
(1)求证:
;
(2)若⊙
的半径为
,
,求
的长.
如图,在⊙
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573017246253056/1573017252708352/STEM/bd915a00a2fb49029dc392368b4e0447.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573017246253056/1573017252708352/STEM/7df0238e840e4b489d0f5faeaf9146df.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573017246253056/1573017252708352/STEM/f40232a884aa4144bada5a26736f40e4.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573017246253056/1573017252708352/STEM/bd915a00a2fb49029dc392368b4e0447.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573017246253056/1573017252708352/STEM/b28e89f8a54c4b87885d5661d79e896d.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573017246253056/1573017252708352/STEM/8029f143c0cf49a694ba2adbc01d3a65.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573017246253056/1573017252708352/STEM/7df0238e840e4b489d0f5faeaf9146df.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573017246253056/1573017252708352/STEM/3e1dd0dc554f4485b3686cffe6fb18fc.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573017246253056/1573017252708352/STEM/c31c855323d24d059c22c68c5b4ce601.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573017246253056/1573017252708352/STEM/712dc1f6e4d242ac897e63cdcab1af3b.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573017246253056/1573017252708352/STEM/bd915a00a2fb49029dc392368b4e0447.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573017246253056/1573017252708352/STEM/9b0319724cee482e8e8f061d323476ba.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573017246253056/1573017252708352/STEM/db76e342dddd4f21a0e18f6effa2ccd4.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573017246253056/1573017252708352/STEM/cc27b86042a741bcb2a771ff0a06574a.png)
(2)若⊙
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573017246253056/1573017252708352/STEM/bd915a00a2fb49029dc392368b4e0447.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573017246253056/1573017252708352/STEM/0a69bcd87b0e4530956d8e8a0132a367.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573017246253056/1573017252708352/STEM/889219afa9e54fbd9315a9f630179c6b.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573017246253056/1573017252708352/STEM/c2205b25c0434ac8aae5961ac7f3ad9d.png)
您最近一年使用:0次
2 . 选修4-1:几何证明选讲
如图,
切圆
于点
,点
为
的中点,过
作圆
的割线交圆
于点
,连接
并延长交圆
于点
,连接
并交圆
于点
,求证:
.
如图,
![](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/7f9e8449aad35c5d840a3395ea86df6d.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/895dc3dc3a6606ff487a4c4863e18509.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/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/058f36d315245b63a811d5c6f348c17b.png)
![](https://img.xkw.com/dksih/QBM/2016/9/12/1573015553179648/1573015559495680/STEM/8138abd94b254baf8fb5387606bed305.png)
您最近一年使用:0次
2016-12-04更新
|
190次组卷
|
2卷引用:2016届广西南宁市高三第二次模拟考试数学(理)试卷
3 . 选修4-1:几何证明选讲
如图,
是
的直径,
是
上一点,
切
于
交
于
,且
.
![](https://img.xkw.com/dksih/QBM/2016/9/12/1573015235788800/1573015242203136/STEM/e2556a61d5794858a6dc4e92a11ad788.png)
(1)求证:
与
相切;
(2)已知
与
交于
,
,求
的长.
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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b294bc03d584963d08ae46b7a10fad1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e61b1b4c9a546a94822a9a2684c20148.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/736da9ab559a1acd3fb37eebc5775f39.png)
![](https://img.xkw.com/dksih/QBM/2016/9/12/1573015235788800/1573015242203136/STEM/e2556a61d5794858a6dc4e92a11ad788.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc32ef00c21c5e77de637ced3ee1250a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
您最近一年使用:0次
4 . 如图所示,已知
和
相交于
两点,过
点作
的切线交
于点
,过点
作两圆的割线,分别交
、
于点
与
相交于点
.
![](https://img.xkw.com/dksih/QBM/2016/9/12/1573014232514560/1573014238773248/STEM/d0abdb0c8ad44d3b87e3b19e56244f18.png)
(Ⅰ)求证:
;
(Ⅱ)若
是
的切线,且
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe6a2c03b88b9ac5d5641e30f64a462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f8ef224337c60baeb1327f4f1973a1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7bdc75c9a9fba398e737d4832101f60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe6a2c03b88b9ac5d5641e30f64a462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f8ef224337c60baeb1327f4f1973a1b.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/4fe6a2c03b88b9ac5d5641e30f64a462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f8ef224337c60baeb1327f4f1973a1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce8c95ab1103b4ff9fff18eb90c7df9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2016/9/12/1573014232514560/1573014238773248/STEM/d0abdb0c8ad44d3b87e3b19e56244f18.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f24398a4072971f71f273bf34737da15.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f8ef224337c60baeb1327f4f1973a1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8b2e4d424dd04c5ed52385c0181e441.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
您最近一年使用:0次
5 . 如图,在
的内接四边形
中,
,过点
作
的切线,交
的延长线于点
.
![](https://img.xkw.com/dksih/QBM/2016/9/12/1573012860035072/1573012866654208/STEM/bce00b5282e64c969d487418fe2a8fad.png)
(1)证明:
;
(2)若
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2335610d92b3b6cddc6460ffd3af7a54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34b0c4c783dd55685bd3e88bb31c6696.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0f582db447034cdde8d8d5d6c2f0ca2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca66a268d6f46e0e9d5d9151b785be60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2335610d92b3b6cddc6460ffd3af7a54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d86a0a3e867a448094f74a54a1fee64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ebbd866e455cf80ea669c9f56f792c.png)
![](https://img.xkw.com/dksih/QBM/2016/9/12/1573012860035072/1573012866654208/STEM/bce00b5282e64c969d487418fe2a8fad.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8d898d04544c01fe8acb06c292cf1d6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5f00017c08a261022d941b535c61825.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6487570003f71e6d7439ed7dc0a15b7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/839e8e2dda40945de5588c1920b6f95b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec5402fd66f25b025c2f89c0897354d9.png)
您最近一年使用:0次
6 . 选修4-1:几何证明选讲
如图,四边形
内接于
,过点
作
的切线
,交
的延长线于
,
.
![](https://img.xkw.com/dksih/QBM/2016/9/9/1573010931654656/1573010937626624/STEM/3b8bf95bdc44496bb113aba6935c01a3.png)
(1)若
是
的直径,求
的大小 ;
(2)若
,求证:
.
如图,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/41fee0f0b284f0e5df672e09bf97a366.png)
![](https://img.xkw.com/dksih/QBM/2016/9/9/1573010931654656/1573010937626624/STEM/3b8bf95bdc44496bb113aba6935c01a3.png)
(1)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)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41fee0f0b284f0e5df672e09bf97a366.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1de2c2a48dbe6e61f4c3d63fa5ac8d8b.png)
您最近一年使用:0次
2016-12-04更新
|
106次组卷
|
2卷引用:2016届内蒙古赤峰市高三4月统一能力测试数学(理)试卷
7 . 选修4-1:几何证明选讲
已知点
是圆
外的一点,过
作圆
的切线
,切点为
,过
作一割线交圆
于点
,若
,取
的中点
,连接
,并延长交圆于
.
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573006592401408/1573006598922240/STEM/d669c87664da42e78176d59022d6c8c1.png)
(1)求证:
四点共圆;
(2)求证:
.
已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a331c53433e7b7472361b5a5bdf2d2f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573006592401408/1573006598922240/STEM/d669c87664da42e78176d59022d6c8c1.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b89f0348aabf400d5a68674e4360261d.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/593f21796cf321a7886d1c8bffe6075a.png)
您最近一年使用:0次
2016-12-04更新
|
109次组卷
|
2卷引用:2016届广西五市高三5月联合模拟数学(理)试卷
8 . 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)
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9 . 选修4-1:几何证明选讲
如图,
是
的外接圆,
的平分线
交
于
,交
于
,连接
并延长, 交
于
,交
于
.
![](https://img.xkw.com/dksih/QBM/2016/9/7/1573003126251520/1573003132870656/STEM/a5e23fa7201644d1bf658198a0a2c24e.png)
(1)证明:
;
(2)若
求
的长.
如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6062582a0a1679aa777451f25008411d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdc93e193fad261689949a52819753f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2016/9/7/1573003126251520/1573003132870656/STEM/a5e23fa7201644d1bf658198a0a2c24e.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5c2123f90f931140fe9f85a3e61e30d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04a30bf456a72760e9a91e070752d8a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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2016-12-04更新
|
120次组卷
|
3卷引用:2016届山西晋城市高三下学期三模考试理数学试卷
10 . 选修4-1:几何证明选讲
已知
中,
,
是
外接圆劣弧
上的点(不与点
重合),延长
至
,延长
至
.
![](https://img.xkw.com/dksih/QBM/2016/9/7/1573002676461568/1573002682957824/STEM/30ee776e7b61401489a3ac69ce006b2d.png)
(1)求证:
;
(2)若
,
中
边上的高为
,求
外接圆的面积.
已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/098a3e7d1f1890863b7483a98b618119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2016/9/7/1573002676461568/1573002682957824/STEM/30ee776e7b61401489a3ac69ce006b2d.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27b9fad2d1591b8141849ddece51b83a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea2ab040c9654f0b3ed5150c9b55bf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab46ea0cba2d06283fae3d864a2329e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
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