13-14高三上·重庆·阶段练习
1 . 如图,圆
的直径
与弦
交于点
,
,则![](https://img.xkw.com/dksih/QBM/2014/10/29/1571888266911744/1571888272678912/STEM/25e999e12eb9420fbd8a9622900d1302.png?resizew=57)
______ .
![](https://img.xkw.com/dksih/QBM/2014/10/29/1571888266911744/1571888272678912/STEM/15bec9ececa545e58d189f4a546c0e87.png?resizew=16)
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d25c4516b3f9b08abf0045fb8a69f6f.png)
![](https://img.xkw.com/dksih/QBM/2014/10/29/1571888266911744/1571888272678912/STEM/25e999e12eb9420fbd8a9622900d1302.png?resizew=57)
![](https://img.xkw.com/dksih/QBM/2013/11/11/1571388312240128/1571388317687808/STEM/898d8f69-59f8-4f2b-9719-11d4cc96b348.png?resizew=202)
您最近一年使用:0次
2013·河南郑州·一模
2 . 如图,在△ABC中,CD是∠ACB的平分线,△ACD的外接圆交BC于点E,AB=2AC.
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560111501312/1572560117145600/STEM/e1066d69f14c4558aded214b8d4dc80a.png)
(Ⅰ)求证:BE=2AD;
(Ⅱ)当AC=1,EC=2时,求AD的长.
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560111501312/1572560117145600/STEM/e1066d69f14c4558aded214b8d4dc80a.png)
(Ⅰ)求证:BE=2AD;
(Ⅱ)当AC=1,EC=2时,求AD的长.
您最近一年使用:0次
2016-12-02更新
|
376次组卷
|
5卷引用:2016届重庆市巴蜀中学高三3月月考理科数学试卷2
2016届重庆市巴蜀中学高三3月月考理科数学试卷2(已下线)2014届河南省中原名校联盟高三上学期第一次摸底考试理科数学试卷(已下线)2014届河南省中原名校联盟高三上学期第一次摸底考试文科数学试卷2016届吉林省松原市油田高中高三上学期期末文科数学试卷2016届广西来宾市高三上学期期末文科数学试卷
12-13高三·河南南阳·阶段练习
3 . 如图,在
中,
是
的角平分线,
的外接圆交
于点
,
.
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572696996036608/1572697002213376/STEM/a1d2f57cf6d74c838b101b1424485b37.png)
(1)证明:
;
(2)当
,
时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0427054c47e348f35771872fd0215a8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c71855e55064d1dc59eabe43e73a881.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/846071242f981289741ad19f4e7190cf.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572696996036608/1572697002213376/STEM/a1d2f57cf6d74c838b101b1424485b37.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679372e54c59c5cf67931b12b9833e02.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca036d049f5205cf04cb1b9c5cd03f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72f7d9f5e71bfef8188b1216c1276c2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
您最近一年使用:0次
2016-12-02更新
|
728次组卷
|
7卷引用:2015-2016学年重庆八中高二下阶段性检测五文科数学试卷
2013·青海西宁·一模
4 . 如图,正方形
的边长为
,延长
至
,使
,连接
、
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1e0b195cb4e229fdd901f6d69f40688.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1364213f546b37f8764ddcb59e36ae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1e0b195cb4e229fdd901f6d69f40688.png)
![](https://img.xkw.com/dksih/QBM/2014/9/12/1571852442075136/1571852447907840/STEM/e11f627447804b5aa653e93c74266cc0.png?resizew=136)
您最近一年使用:0次
2016-12-02更新
|
577次组卷
|
6卷引用:2015-2016学年重庆一中高二下期中文科数学试卷
2015-2016学年重庆一中高二下期中文科数学试卷(已下线)2013届青海省西宁五中片区高三大联考文科数学试卷(已下线)2014届陕西省西工大附中高三上学期第三次训练理科数学试卷(已下线)2014届陕西省西工大附中高三上学期第三次训练文科数学试卷3-7 正、余弦定理的应用举例(高效训练)-2019版导学教程一轮复习数学(人教版)广东省深圳市四校发展联盟体2018-2019学年高一下学期期中数学试题
12-13高三下·内蒙古赤峰·阶段练习
5 . 选修4—1:几何证明选讲.
如图,过圆
外一点
的作圆
的切线
,
为切点,过
的中点
的直线交圆
于
两点,连接
并延长交圆
于点
,连接
交圆
于点
,若
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/16/fc18b955-cfac-4d90-925c-c9e4c9f7dfb1.png?resizew=241)
(1)求证:
∽
;
(2)求证:四边形
是平行四边形.
如图,过圆
![](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/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](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/c5db41a1f31d6baee7c69990811edb9f.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85a84d5c2699c43c88982b493628f496.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/16/fc18b955-cfac-4d90-925c-c9e4c9f7dfb1.png?resizew=241)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/784b26de6134b6d3f5a81e2882a7d7f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
(2)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b03589460aa53f9b666268f76438918.png)
您最近一年使用:0次
2016-12-02更新
|
826次组卷
|
6卷引用:2016届重庆市一中高三下学期模拟文科数学试卷
2016届重庆市一中高三下学期模拟文科数学试卷2017届重庆市第一中学高三10月月考数学(文)试卷(已下线)2013届内蒙古赤峰二中、平煤高中高三5月联合考试文科数学试卷2016届吉林省长春市普通高中高三质量监测二理科数学试卷2016届吉林省长春市普通高中高三质量监测二文科数学试卷2016届河南省郑州一中高三考前冲刺四文科数学试卷
12-13高三上·广东肇庆·期末
6 . 如图,
为圆
的两条割线,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bad3f71ae38f3f04f112bb799c39142e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c5d2b1f9269e4fecd22878c4afd0425.png)
,则
的长为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc7fbe500296c20faff8c8b1c694b67d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bad3f71ae38f3f04f112bb799c39142e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c5d2b1f9269e4fecd22878c4afd0425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/2012/11/12/1571059827736576/1571059832946688/STEM/b25fb3c2-d686-4836-bc11-ed51ebfdd27a.png?resizew=248)
您最近一年使用:0次
2016-12-02更新
|
1051次组卷
|
6卷引用:2014届重庆市第八中学高三第六次月考理科数学试卷
(已下线)2014届重庆市第八中学高三第六次月考理科数学试卷(已下线)2012届广东省肇庆市高三上学期期末考试理科数学试题(已下线)2012届广东省肇庆市高三上学期期末考试理科数学试卷(已下线)2013届广东省广宁县广宁中学高三2月月考理科数学试卷2015届广东省中山一中等七校高三12月联考理科数学试卷2015届湖南省长浏宁三一中高三5月模拟考试理科数学试卷
11-12高二下·河北衡水·期中
7 . 如图,
是圆
的直径,
是弦,
的平分线
交圆
于点
,
,交
的延长线于点
,
交
于点
.
![](https://img.xkw.com/dksih/QBM/2016/3/29/1572564572160000/1572564578017280/STEM/f3ab4708d7aa48c28db3b6cd3b5d30d3.png)
(1)求证:
是圆
的切线;
(2)若
,求
的值.
![](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/60ef95894ceebaf236170e8832dcf7e3.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/535a65c61f47d2b893706d4bc3499e20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.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/2016/3/29/1572564572160000/1572564578017280/STEM/f3ab4708d7aa48c28db3b6cd3b5d30d3.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/965fb2996af2e489d87040b255394a6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929e72e9d26c3bda1fba680ca48cd95d.png)
您最近一年使用:0次
2016-12-01更新
|
710次组卷
|
6卷引用:2016届重庆一中高三下学期3月月考文科数学试卷
2016届重庆一中高三下学期3月月考文科数学试卷2015-2016学年重庆一中高二下期中文科数学试卷(已下线)2011-2012学年河北省冀州中学高二下学期期中文科数学A试卷2016届江西师大附中高三上学期期末理科数学试卷2016届江西师大附中高三上学期期末文科数学试卷2015-2016学年贵州思南中学高二下学期期末理数学理试卷