2.5.1直线与圆的位置关系
基础练
一、单选题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c31c4f39399ec245a67db2933ed639f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f5d967ad135991b6075ee45df55643.png)
A.0 | B.1 | C.2 | D.3 |
【知识点】 判断直线与圆的位置关系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4332c20cc361e0240a8ffbef0ca106eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 圆的弦长与中点弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b7d7ca9b1970b78a6e7b5b6cfbe3533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 已知切线求参数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5df9e76f89f4e18ddedceb4f7cc7c46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26a37146053a7074480f49e7bdddf41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 由直线与圆的位置关系求参数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e888af040ba6125443ccdf1f1aa0d902.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7f61f0057c8530174874228bf8b9597.png)
A.1 | B.2 | C.![]() | D.![]() |
【知识点】 过圆内定点的弦长最值(范围)
二、填空题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bb72838700196acec54327a3ec0ecdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79382ba44ba669b5d43fdd5427adf16c.png)
【知识点】 过圆上一点的圆的切线方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbc9203dd346be55eddfe5b5a76ce345.png)
【知识点】 圆的弦长与中点弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797c488729678e74e0825c2e92b544b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8a2d7360d2125440b0c40688505f2fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/838869164f73c211c0eb4a7c60091682.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f05c938fd42f5cb0b9d21cd44acbec6e.png)
【知识点】 切线长 由圆的一般方程确定圆心和半径
三、解答题
(1)求圆C的方程;
(2)设直线3x﹣4y+15=0与圆C交于A,B两点,求△ABC的面积.
【知识点】 由圆心(或半径)求圆的方程 圆内接三角形的面积