图①、图②都是4×4的正方形网格,每个小正方形的顶点称为格点,每个小正方形的边长均为1.在每个网格中标注了5个格点,按下列要求画图:
(1)在图①中,以格点为顶点画一个等腰三角形,使其内部已标注的格点只有3个;
(2)在图②中,以格点为顶点画一个等腰三角形,使其内部已标注的格点只有2个,并且面积为3.
(1)在图①中,以格点为顶点画一个等腰三角形,使其内部已标注的格点只有3个;
(2)在图②中,以格点为顶点画一个等腰三角形,使其内部已标注的格点只有2个,并且面积为3.
![](https://img.xkw.com/dksih/QBM/2019/3/7/2155241064955904/2156260041424896/STEM/5c1de64e1cbe42c4ad526552e00d2289.png?resizew=285)
更新时间:2019-03-08 21:05:11
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【知识点】 等腰三角形的定义
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解答题-计算题
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适中
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【推荐1】已知
为
的三边长.
(1)化简:
;
(2)若
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,
为偶数,判断
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bba1e7a657ed134e68efd159b606620f.png)
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(1)化简:
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(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82986ab38a4ae58593191ccae2a44f62.png)
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解答题-证明题
|
适中
(0.65)
名校
【推荐2】模型建立:
如图1,在等腰直角
中,
,
,直线
经过点
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/11/2d82a563-35af-4451-9847-70c2675917ed.png?resizew=497)
模型应用:
(1)求证:
;
(2)已知直线
:
与
、
轴分别交于点
、
,直线
过点
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的夹角等于
,如图
,求直线
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(3)如图3,在长方形
中,点
,点
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上一动点,
,已知点
在第 一象限,是直线
上的一点,若
是等腰三角形,且
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如图1,在等腰直角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ae3334667a907e211a369d1457f861e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6749f967f0e002d91207e4f48a46ca13.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/11/2d82a563-35af-4451-9847-70c2675917ed.png?resizew=497)
模型应用:
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/347035600b2754641d2e9e7c1629fa52.png)
(2)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d27c081879b6c6bc0abb0ceedb9d3a.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d45e12a06ff0d0a6a53f2bfe573bc2.png)
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(3)如图3,在长方形
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