【论证】
(1)如图1,在
中,
,且
,直线l经过点A,
直线l,
直线l,垂足分别为D,E.求证:
.
【尝试】
(2)如图2,在平面直角坐标系中,点
,点
,点C在第二象限,
,
.请直接写出点C的坐标:______.
【拓展】
(3)在(2)的条件下,点M在第一象限,且
为等腰直角三角形.请直接写出所有满足条件的点M的坐标.
(1)如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44b190c8d3d7d7d0e6e959e8a52eae90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29ba3cd82c31340efb54c711e20147da.png)
【尝试】
(2)如图2,在平面直角坐标系中,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6251a33e2fe0754231fec293f75740b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f605a7fc2f1064fe14882ee426839db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
【拓展】
(3)在(2)的条件下,点M在第一象限,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a11cb104b04c4e6a1be700e81da279a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/15/75178913-8b8b-45f0-bbd9-6f930957bbeb.png?resizew=400)
更新时间:2024-02-16 15:20:04
|
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【推荐1】两点之间的距离公式:若数轴上两点
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问题提出:对于平面上的任意两点
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问题探究:
(1)①如图1,
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两点之间的距离
_______;
②如图2,已知平面上两点
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(2)一般地,已知平面上任意两点
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
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问题提出:对于平面上的任意两点
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问题探究:
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a0cea9f32869972bd433476cf92a0c6.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d521c9bf37ce287bc559b016d79e1101.png)
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【推荐2】已知平行四边形的三个顶点A(3,2),C(0,0),B(5,0),且BC=AD,请画图并求D点坐标.
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适中
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【推荐1】综合与实践:
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【拓展迁移】(3)小阳深入研究小宇提出的这个问题,发现并提出新的探究点:如图3,在正方形
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【实践探究】(2)小宇受此问题启发,逆向思考并提出新的问题:如图2,在正方形
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名校
【推荐2】已知关于
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