1 . 选修4-1:几何证明选讲
如图,过点
作圆
的割线
与切线
,
为切点,连接
,
,
的平分线与
,
分别交于点
,
,其中
.
![](https://img.xkw.com/dksih/QBM/2015/3/25/1572031037652992/1572031043420160/STEM/5996f1f3c9e244e0a3d90f4a4bec5612.png)
求证:
;
求
的大小.
如图,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ab653ffa6acf8b28096ff54719579d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81574a3738c0a314293ff7c74248971.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04e701290896a6a607a80c6556e833b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caef922685cef76f1ad8475c29bd04a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ebbd866e455cf80ea669c9f56f792c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4afa86900c651a7ce4a2a180e06f9008.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c065b293986a6728dae546acc0b199.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8d9ef421906bd73837cdba683037917.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4afa86900c651a7ce4a2a180e06f9008.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c065b293986a6728dae546acc0b199.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca66a268d6f46e0e9d5d9151b785be60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f0b669ef4514f24ee09adeff7f41238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b309a69bd4786e90412a810e8ad0600c.png)
![](https://img.xkw.com/dksih/QBM/2015/3/25/1572031037652992/1572031043420160/STEM/5996f1f3c9e244e0a3d90f4a4bec5612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1baca09215d12421a58bd6a48ae16c35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd133f93f01cc7cfd566e8aaf7629000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac0c12379ff58d8ddf66547d7a873baf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea899a0aa6359022562ecf806c9e517e.png)
您最近一年使用:0次
2019-01-30更新
|
256次组卷
|
2卷引用:2015届吉林省长春市普通高中高三质量监测(二)理科数学试卷
2010高三·全国·专题练习
2 . 如图所示,过
外一点
作一条直线与
交于
,
两点,已知
,点
到
的切线长
,则弦
的长为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5fca8c94add435f4aefb933ffe55a01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
真题
3 . 如图所示,过
外一点
作一条直线与
交于
,
两点,已知
,点
到
的切线长
,则弦
的长为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5fca8c94add435f4aefb933ffe55a01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
4 . 如图,
为圆
的直径,
为圆
外一点,过
点作
于
,交圆
于
点,
交圆
于
点,
交
于
点.
![](https://img.xkw.com/dksih/QBM/2017/12/23/1844447098101760/1846014722129920/STEM/f07f1227e1fe48a49037e2af8a476901.png?resizew=149)
(Ⅰ)求证:
;
(Ⅱ)求证:
![](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/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/a1e4b16c2c6c9bd089da78122e9d2511.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/bd33764ff4efddfe11a98a609753715c.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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2017/12/23/1844447098101760/1846014722129920/STEM/f07f1227e1fe48a49037e2af8a476901.png?resizew=149)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d16c2c0de404af921d19fa230aeb0f0d.png)
(Ⅱ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f986b0b0c6d79e0bfb5a37434c1dc7a7.png)
您最近一年使用:0次
5 . 自圆
外一点
引圆
的两条割线
和
,如图所示,其中割线
过圆心
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/ef6942b7-ec55-4a78-a65b-b14c8084a08d.png?resizew=208)
(1)求
的大小;
(2)分别求线段
和
的长度.
![](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/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54d87077425ae6016e8a7cc7293c91fe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/ef6942b7-ec55-4a78-a65b-b14c8084a08d.png?resizew=208)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
(2)分别求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
您最近一年使用:0次
2016-12-03更新
|
304次组卷
|
2卷引用:2016届江西省名校学术联盟高三第一次调研一理科数学试卷
6 . 如图,
为
外一点,
是切线,
为切点,割线
与
相交于点
,
,且
,
为线段
的中点,
的延长线交
于点
,若
,则![](https://img.xkw.com/dksih/QBM/2015/8/6/1572201374056448/1572201379741696/STEM/f32e92fd1a6c450aa26df035d1269dea.png?resizew=37)
__________ ;![](https://img.xkw.com/dksih/QBM/2015/8/6/1572201374056448/1572201379741696/STEM/4d53185f6bc64ef4a9b578e6b7c1a31d.png?resizew=71)
_________ .
![](https://img.xkw.com/dksih/QBM/2015/8/6/1572201374056448/1572201379741696/STEM/1d3753cd3bba4b28839998d4bc815be1.png?resizew=16)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/2015/8/6/1572201374056448/1572201379741696/STEM/a290c5c8df1a42949b9d211ae070148a.png?resizew=25)
![](https://img.xkw.com/dksih/QBM/2015/8/6/1572201374056448/1572201379741696/STEM/46a2b7435d4649faae6ef43b9e7ed8ba.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/8/6/1572201374056448/1572201379741696/STEM/1b4a4d430d2c4df292811eca03a4ea1b.png?resizew=37)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/2015/8/6/1572201374056448/1572201379741696/STEM/39dc1386bd7b4f7297765b191b06a438.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/8/6/1572201374056448/1572201379741696/STEM/15c513a735ea40f1b29ae719c45e5f32.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/8/6/1572201374056448/1572201379741696/STEM/2d62063d16e84187b23d371a12418680.png?resizew=71)
![](https://img.xkw.com/dksih/QBM/2015/8/6/1572201374056448/1572201379741696/STEM/4de392ecfa0b4bcbba9ca723a52aa735.png?resizew=17)
![](https://img.xkw.com/dksih/QBM/2015/8/6/1572201374056448/1572201379741696/STEM/89876b0b808a434fa4643e41e90f63bf.png?resizew=27)
![](https://img.xkw.com/dksih/QBM/2015/8/6/1572201374056448/1572201379741696/STEM/0dfdc0d262a84452bf062ba8ce9b2cc9.png?resizew=28)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/2015/8/6/1572201374056448/1572201379741696/STEM/3288a2058455442d873cf887579060b3.png?resizew=16)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4559ab08021b52736d249a6e4424892.png)
![](https://img.xkw.com/dksih/QBM/2015/8/6/1572201374056448/1572201379741696/STEM/f32e92fd1a6c450aa26df035d1269dea.png?resizew=37)
![](https://img.xkw.com/dksih/QBM/2015/8/6/1572201374056448/1572201379741696/STEM/4d53185f6bc64ef4a9b578e6b7c1a31d.png?resizew=71)
![](https://img.xkw.com/dksih/QBM/2015/8/6/1572201374056448/1572201379741696/STEM/2a22a27640444493a2705eae2b7cb50e.png?resizew=171)
您最近一年使用:0次
7 . 如图,已知
是圆
的切线,切点为
,
交圆
于点
,圆
的半径为2,
,则
的长为___ .
![](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/ef49a3ca580a144cc65a609c167facc1.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c327b3e91d8bea53255d9308a952a276.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://img.xkw.com/dksih/QBM/2015/6/16/1572126552014848/1572126557528064/STEM/9dfce8e687cc46c39e6ed7ec0d033810.png?resizew=160)
您最近一年使用:0次
8 . 如图,延长△ABC的角平分线AD交其外接圆于E,若AD =AB= 1,DE =
,则AC=_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/2015/6/16/1572126201487360/1572126207524864/STEM/460448641459437db3c1fec97ab5ba10.png?resizew=144)
您最近一年使用:0次
9 . (几何证明选讲选做题)如图,PA与圆
相切于A,PCB为圆
的割线,并且不过圆心
,已知
,
,
,则圆
的半径等于__________ .
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba8a127b3fc5dc9e8b4f902adb54ad7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/967f74b8993c61634ceed95edca05ffd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5064f5ce5ac8428e277fd578da84ec6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572103208280064/1572103214129152/STEM/d6528b5aa76b436a85f2e95aee72be56.png?resizew=205)
您最近一年使用:0次
10 . (选修4-1:几何证明选讲)如图,已知直线
切圆
于点
,直线
交圆
于点
、
,若
,
,则圆
的半径长为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff8513b61617aa6b19ad2a764ee3aeae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f97e22c9dd88a2510de9e5a309191934.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e2868b617c871e18c928c9a573bc8c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bec08679eab52e3a0013abecdd1e6cc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f97e22c9dd88a2510de9e5a309191934.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49de2536004d4f0819e781fffca41a2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca66a268d6f46e0e9d5d9151b785be60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad4b3ac161685fc1c03f5591b3ccc1d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc17edc472b148dc491f978333d3bdee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f97e22c9dd88a2510de9e5a309191934.png)
![](https://img.xkw.com/dksih/QBM/2015/3/30/1572047081906176/1572047087263744/STEM/3226845ff076414f97aabeceed7ba595.png?resizew=160)
您最近一年使用:0次