解题方法
1 . 相交弦定理是平面几何中关于圆的一个重要定理:圆内的两条相交弦,被交点分成的两条线段长的积相等,已知圆
的半径为
,弦
,
相交于点
.且
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9934cf2feb65b00392ba39d8242e47.png)
A.![]() |
B.![]() |
C.当![]() ![]() ![]() |
D.当![]() ![]() ![]() |
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2 . 已知直线
与圆
相交于
,
两点,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3683fd5cbf7b7bdef462a3d38ce4eff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9be2c91c4ace79b6d3ce4e86681f2b58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
A.若圆![]() ![]() ![]() |
B.![]() ![]() |
C.当![]() ![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() ![]() ![]() |
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3 . 若直线
与圆
相交于
两点,则
的长度可能等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac02a054bd0771a56987af33454baaea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/475b12154b2420af2584e5716536943c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
A.3 | B.4 | C.5 | D.6 |
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解题方法
4 . 已知椭圆
的离心率为
,右焦点为
,圆
,过
且垂直于
轴的直线被圆
所截得的弦长为
.
(1)求
的标准方程;
(2)若直线
与曲线
交于
两点,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41b96eda0601673fafb836643969914f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd40f44c911918ee3638eb1a24bb1bd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
您最近一年使用:0次
2024-05-04更新
|
800次组卷
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2卷引用:湖南省株洲市炎陵县2023-2024学年高二下学期4月素质质量检测数学试卷
5 . 圆
与圆
相交于A、B两点,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168f39d12a373d597c4c0ad724335c8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/794a2b32e216fa64dbbc9bfa60acf967.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e78f437d506c72c3ce4ad3aa9a5ab749.png)
A.2 | B.![]() | C.![]() | D.6 |
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2024-03-03更新
|
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5卷引用:江苏省南京市田家炳高级中学2023-2024学年高二下学期期中考试数学试卷
6 . 已知圆
,直线
.
(1)求证:直线
恒过定点.
(2)直线
被圆
截得的弦长最短时
的值以及最短弦长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1cd21b824fcf58c75911fb165306d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62622393abcb2f164c14c46d7946226.png)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2024-01-26更新
|
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2卷引用:四川省成都市第三十六中学2023-2024学年高二上学期期中考试数学试题
解题方法
7 . 直线
与圆
相交于
两点,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb4250664bcdf7307618c55a9fceb3d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f93eac562761f68f62c128a6ce316642.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
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解题方法
8 . 已知圆
的圆心为
(
且
),
,圆
与
轴、
轴分别交于
,
两点(与坐标原点
不重合),且线段
为圆
的一条直径.
(1)求证:
的面积为定值;
(2)若直线
经过圆
的圆心,求圆
的方程;
(3)在(2)的条件下,设
是直线
上的一个动点,过点
作圆
的切线
,
,切点为
,
,求线段
长度的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3b5fe7ff4823684bcbd303eb74833a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca27cc54ca0332245f5167488daa3408.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42498f6e0fc9a61c9857b70a87f02c5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(3)在(2)的条件下,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/045cf6c42c53f44921c55a01fc4cdd8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4505508b3e36db64a207dcdaf8eb22dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d58f9019097bd05037aefd5c322916.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/803a617fb53e67edbc2955cb629c329b.png)
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9 . 直线
与圆
交于A,B两点,则
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/874188b1ad1af65fe2951e3a0c1c0e84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/321515ad8df36eb093ec9352c25d1fc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a11cb104b04c4e6a1be700e81da279a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2023-12-22更新
|
209次组卷
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2卷引用:山西省2023-2024学年高二上学期11月期中考试数学试题
10 . 已知圆
:
和圆
:
的交点为A,B,则下列结论中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffd767240a603ca0c0db5567707eb704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4f6f74444b2b7947fc6e35c8d62322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/874eb6035e81942390bd79662dcc6f66.png)
A.公共弦AB所在的直线方程为![]() |
B.公共弦AB的长为![]() |
C.线段AB的中垂线方程为![]() |
D.若P为圆![]() ![]() |
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2023-12-20更新
|
210次组卷
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