12-13高一上·广东中山·期末
1 . 如图,
的三个顶点分别为
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41145744c11dac53b01388efb7209ce.png)
![](https://img.xkw.com/dksih/QBM/2012/2/1/1570709657174016/null/STEM/17c77c0dab304309b9a360886d6c031e.png?resizew=150)
(1)求边
上的中线
所在的直线方程;
(2)求与
平行的中位线
的直线方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9178fc8b5d65aa75fa9196294a0db7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c84818cfbd9a885081cb4e3294eabe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f54847f52512978e2c8540baac7206e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41145744c11dac53b01388efb7209ce.png)
![](https://img.xkw.com/dksih/QBM/2012/2/1/1570709657174016/null/STEM/17c77c0dab304309b9a360886d6c031e.png?resizew=150)
(1)求边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
(2)求与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
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9-10高二下·上海黄浦·期末
名校
解题方法
2 . 经过点
的直线l的点方向式方程是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d574f62e7987445012856cb971d7024.png)
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11-12高二上·广东佛山·期中
3 . 求满足下列条件的直线方程:
(1)过点(2,3),斜率是直线
斜率的一半;
(2)过点(1,0),且过直线直线
与直线
的交点
(1)过点(2,3),斜率是直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/270ef8c5530d7319d71931244f44d1d5.png)
(2)过点(1,0),且过直线直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c622496fa791bc460cf87c7e0f56f445.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b0dee18f882b2058c6a3246925e5fca.png)
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名校
解题方法
4 . 已知
的三个顶点分别为
.
(1)求
的面积;
(2)求
的外接圆的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0de0ae18715f97f0244932abedbbb76.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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