解题方法
1 . 已知圆
,直线
,点
是
上的一个动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/c4fb058c-0413-445e-a89b-1533542924d4.png?resizew=172)
(1)若点
,过点
作一条斜率为
的直线,该直线与圆
交于
、
两点(
、
位于
轴上方),过
、
分别作直线
的垂线,垂线与
轴交于
、
两点,求
的值.
(2)过动点
作圆
的两条切线,切点分别为
、
,试问直线
是否过定点?若是,请求出定点坐标;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79382ba44ba669b5d43fdd5427adf16c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/495bb3e5a3a9d35f5c9f0cf1f5d51876.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/c4fb058c-0413-445e-a89b-1533542924d4.png?resizew=172)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb75c4d29198a615b3e2b7b819974ac5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.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/7f9e8449aad35c5d840a3395ea86df6d.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/81dea63b8ce3e51adf66cf7b9982a248.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c761dad84bd29109dc0ffc31b9cbbd46.png)
(2)过动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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2 . 已知C,D是圆A:
与圆B:
的公共点,则
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d30337ed2f68b73a050688566eac4e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b63af296fafc50c28e75e34bee1f9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
解题方法
3 . 已知圆
和
.
(1)证明:圆
与圆
相交;
(2)求圆
与圆
的公共弦长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/995f8c90a4d54afc9f671ba7114d96cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02f7f5b5bb7879e5f4c688069f20882d.png)
(1)证明:圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)求圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
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2022-11-23更新
|
184次组卷
|
2卷引用:甘肃省永昌县第一高级中学2022-2023学年高二上学期期中考试数学试题
4 . 圆
始终平分圆
的周长,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5fdb000c85bf5ce936dec4f3365fd2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b25df0a6c7906cdc3ec180104ddb2a23.png)
A.![]() |
B.![]() ![]() ![]() |
C.![]() |
D.直线![]() ![]() ![]() |
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5 . 圆x
与圆x
相交所得的公共弦所在直线方程为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c47d8988fe67fe1e5259d3b76043b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9e72be5cc65dc798b91114bffd0866c.png)
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2020-11-21更新
|
460次组卷
|
5卷引用:沪教版(2020) 选修第一册 领航者 第2章 2.1圆 第4课时 圆与圆的位置关系
名校
6 . 已知圆
与
相交,它们公共弦所在直线的方程是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73e25b317906ca42ab1c73779cb462ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba07cd21c6cf657e5f01dc445d8e4e69.png)
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2021-01-05更新
|
298次组卷
|
6卷引用:黑龙江省鸡东县第二中学2021-2022学年高二下学期开学考试数学试题
7 . 在平面直角坐标系xOy中,曲线
(
为参数),以坐标原点为极点,x轴正半轴为极轴建立极坐标系,曲线
的极坐标方程为
,且
与
的交线为
.
(1)写出
的普通方程和
的直角坐标方程,并求
与
的公共弦长;
(2)设
,且
与
交于
两点,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5da9e3516dbdde7d76833049440e2bc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f1324197898b09a036b3a82c9262f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(1)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4007d7236de583d0dff558641240992.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04a3f21d4d834ba5b8b80dd56732c136.png)
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8 . 已知圆
,圆
,则这两个圆的公共弦长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdecae43d7fba9ad99b38bd72940d58c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67860b0bc58316d4341247576df22924.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-12-26更新
|
396次组卷
|
7卷引用:湘教版(2019) 选修第一册 突围者 第2章 第六节 课时2 圆与圆的位置关系
名校
9 . 过点
作圆
的两条切线,切点分别为
,
,则
所在直线的方程为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/577620a3b886932bbcf2f2f3dd725d87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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2021高二·江苏·专题练习
10 . 已知圆C的圆心为原点O,且与直线
相切,若点P在直线
上,过P点引圆C的两条切线
,切点为
,则直线
恒过定点_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45eaae310afe86d8dbdd9079328cf5c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/224d30ca84f1aeeeda7a718e751a4925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e58e5a299e7b6b508c61244b93ae1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ae6f48b9a53c0155a692509cf31f7e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d25313067f3e11f68da496344c4956.png)
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