如图,分别作出点P关于
的对称点
,连接
,分别交
于点M、N,
(1)若
,求
的周长.
(2)若
,试判断
,的形状并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f47ddc7c9fb41942160e3cafcf756776.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/594fa9a4bce1ed5fd27e4cb55d63cf0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4a949c00526fddf435423272cf10f25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f47ddc7c9fb41942160e3cafcf756776.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/19/5583782a-fe40-407e-b01d-ba35ebd1a906.png?resizew=159)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bbaaaf7c32577c699710fa616a47536.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ed4c4e8edbd179f3fc38a6653f18c1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6131160eaee962470abc7771df265c6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/249d6fad7f9244ae86ec2e13e52acba9.png)
23-24八年级上·江苏泰州·周测 查看更多[3]
(已下线)江苏省泰州市姜堰区第四中学2023-2024学年八年级上学期数学独立作业10.10江苏省泰州市民兴中英文学校2023-2024学年八年级上学期10月月考数学试题江苏省泰州市姜堰区第四中学2023-2024学年八年级上学期10月月考数学试题
更新时间:2023-10-11 21:38:24
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相似题推荐
解答题-问答题
|
较易
(0.85)
【推荐1】阅读材料:若
,求
、
的值.
解:∵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/676454d1f3fe1077d1f544613af1572a.png)
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55868969a0dc619b0ece1423e2c9f33.png)
∴
,
∴
,
,
∴
,
.
根据你的观察,解答下面的问题:
(1)已知
,求
的值;
(2)已知
、
、
为
三边,且
,判断
的形状.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ea4431eb0d74b2ee298f027e71cb967.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
解:∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/676454d1f3fe1077d1f544613af1572a.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55868969a0dc619b0ece1423e2c9f33.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00b075f027a40f9e4f15d481eb20aec4.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a2e94026e72e6dab46295c229905369.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98912998556ef3f2907bee2a7531dc50.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fac3649308b528fd56545ba102dc42d5.png)
根据你的观察,解答下面的问题:
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cef8e984f930ce80f824533a797bb020.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f29d5f376c75c41ae6af0c8a8565449.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd8c37b361428021327d8b8c8620546f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解答题-证明题
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【推荐2】学习过等边三角形,小丽用折纸的方法裁出一个等边三角形.如图,先将正方形纸片对折后展开,折痕为
.点E在线段
上,连接
,将
沿
折叠,点B落在
上的点H处,连接
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即为等边三角形,请给予证明.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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您最近一年使用:0次
解答题-作图题
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【推荐1】如图,已知△ABC的三个顶点的坐标分别为A(﹣2,3)、B(﹣6,0)、C(﹣1,0).
(1)画出△ABC关于原点成中心对称的三角形△A1B1C1;
(2)将△ABC绕坐标原点O顺时针旋转90°,画出图形△A2B2C2;
(3)在
轴上找一点P,使得PA+PA2的值最小,则点P的坐标是 .
(1)画出△ABC关于原点成中心对称的三角形△A1B1C1;
(2)将△ABC绕坐标原点O顺时针旋转90°,画出图形△A2B2C2;
(3)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/2021/4/28/2709350411247616/2767735413669888/STEM/9d6ea840-7bdf-4334-9e63-fbf81f899246.png)
您最近一年使用:0次
解答题-作图题
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较易
(0.85)
【推荐2】如图,
在平面直角坐标系中,点A、B、C的坐标分别为
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/16/48d8df14-38e4-4581-9f3b-86d656071bb1.jpg?resizew=261)
(1)作图:作
关于y轴对称的
,其中,点A、B、C的对应点分别为
、
、
;
(2)求
的面积;
(3)作图:在x轴上找一点P使得
的值最小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32463e54b757bd3d44232e1d9c81d094.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b22df4e45cb094fbd84e55f3728ec8f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df56717ef414b1cdf053a710ef135ab6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/16/48d8df14-38e4-4581-9f3b-86d656071bb1.jpg?resizew=261)
(1)作图:作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)作图:在x轴上找一点P使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a13ec9a812274ad0839f20ba17348687.png)
您最近一年使用:0次