如图1,已知线段BC=2,点B关于直线AC的对称点是点D,点E为射线CA上一点,且ED=BD,连接DE,BE.
(1)依据题意补全图1,并证明:△BDE为等边三角形;
(2)若∠ACB=45°,点C关于直线BD的对称点为点F,连接FD、FB,将△CDE绕点D顺时针旋转
度(0°<
<360°)得
, 点E的对应点为E’,点C的对应点为点C’.
(i)如图2,当
时 ,连接BC’.证明:EF=BC’;
(ii)如图3,点M为DC中点,点P为线段C’E’上任意一点,试探究:在此旋转过程中,线段PM长度的取值范围?(直接写出答案).
(1)依据题意补全图1,并证明:△BDE为等边三角形;
(2)若∠ACB=45°,点C关于直线BD的对称点为点F,连接FD、FB,将△CDE绕点D顺时针旋转
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/549e807ed5636b783c51603d38337313.png)
(i)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c96cb3ac8290e09c55d4eb336a8608.png)
(ii)如图3,点M为DC中点,点P为线段C’E’上任意一点,试探究:在此旋转过程中,线段PM长度的取值范围?(直接写出答案).
![](https://img.xkw.com/dksih/QBM/2018/12/21/2101671599824896/2104507120484353/STEM/bc3b1a0338db4877925d2a059c7a6f34.png?resizew=426)
更新时间:2018-12-25 18:13:36
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【知识点】 旋转综合题(几何变换)
相似题推荐
解答题-作图题
|
适中
(0.65)
【推荐1】如图,在平面直角坐标系中,
的三个顶点都在格点上,点
的坐标为
.
关于
轴对称的
,并写出点
的坐标
.
(2)画出
绕原点
旋转后
得到的
,并写出
点的坐标
.
(3)
是否为直角三角形?答 (填是或者不是).
(4)利用格点图,画出
边上的高
,并求出
的长,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3247f03357462fec934f37c65ebdc77e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62c3135fa20c32d04a270750f77c1f2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
(2)画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62c3135fa20c32d04a270750f77c1f2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e7a123c9cc0e058db28841fb0edcf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/403590d719951bd6133479f4e52041bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
(4)利用格点图,画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f63d194aa0d4091618b6f41f569ee2.png)
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