如图,在
中,已知
的垂直平分线交
于点N,交
于点M,连接
.
![](https://img.xkw.com/dksih/QBM/2021/2/4/2650885871738880/2662133883207680/STEM/32b0f42c-47eb-4722-9d3e-3ffb1618acf0.png)
(1)若
,求
的度数.
(2)若
,
的周长是
.
①求
的长度;
②若点P为直线
上一点,请你求出
周长的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bed1b015150b0e23bf89383508fe129.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://img.xkw.com/dksih/QBM/2021/2/4/2650885871738880/2662133883207680/STEM/32b0f42c-47eb-4722-9d3e-3ffb1618acf0.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a858e3fda1505e5aede22f4d6edd3f31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7098c45594103b46e6b57cfc6023e93.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82cf997be91eba5aa57c308a3461c799.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad3e2b2689dfe97ec82d473ab6cf469.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27e5fcbf7211cf412f4614701ef38518.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
②若点P为直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
20-21八年级上·江西赣州·期末 查看更多[3]
江西省赣州市寻乌县2020-2021学年八年级上学期期末数学试题(已下线)专题13.21 课程学习(最短路径问题)(基础练)-2023-2024学年八年级数学上册基础知识专项突破讲与练(人教版)(已下线)专题2.21 轴对称的最值问题(基础练)-2023-2024学年八年级数学上册基础知识专项突破讲与练(苏科版)
更新时间:2021-02-20 14:28:09
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【推荐1】如图,在△ABC中,D是AC的中点,且BD⊥AC,ED
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【推荐2】(1)如图①,方格纸中有2个格点A,B.仅用无刻度的直尺画出线段
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(2)如图②,点
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解答题-证明题
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【推荐1】如图,将
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/9/e98b258f-6d9d-41da-a3a6-3bc58377f1b0.png?resizew=140)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0433f8116768b42642a7f7e5977ce6.png)
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