已知
,等边
与
顶点
重合,将等边
绕顶点
顺时针旋转,边
所在直线与
的
边相交于点
,并在
边上截取
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/15/1c569c6c-f4b1-4793-9dfb-ad7f49ad5db3.jpg?resizew=378)
(1)将等边
旋转至如图①所示位置时,求证:
;
(2)将等边
顺时针旋转至如图②、图③位置时,请分别直接写出
,
,
之间的数量关系(需要证明);
(3)在(1)和(2)的条件下,若
,
,则
______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2449b6be64417beea30528886720c20f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e44d9f2b82b73e7a0917a19f74dbc5f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e44d9f2b82b73e7a0917a19f74dbc5f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/15/1c569c6c-f4b1-4793-9dfb-ad7f49ad5db3.jpg?resizew=378)
(1)将等边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394bc1c4317953135bc53647a7b26b67.png)
(2)将等边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(3)在(1)和(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d64e0206b1814c35cc96bd2b6b12239a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1364213f546b37f8764ddcb59e36ae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5277fa450a0c513a86a74420f8ee99f6.png)
更新时间:2024-01-15 09:01:11
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】
和
都是等腰直角三角形,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/20/b0146071-abd8-4209-8847-e37289a9a6ed.png?resizew=497)
(1)如图①,若
的顶点A在
的斜边
上,请直接写出
的数量关系_______;
(2)将
绕点C旋转到如图②所示位置,点B在线段
上,连
,则(1)中的结论还成立吗?若成立,请证明;若不成立,请给出正确结论并说明理由.
(3)在
绕点C旋转过程中,当A、E、B三点共线时,若
,请直接写出
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b40c2b0ab8e1cfe5112d428b4b829f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b265d121f9ebc13671a5719604476a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/068f595fb838057e7b579293f09622cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/20/b0146071-abd8-4209-8847-e37289a9a6ed.png?resizew=497)
(1)如图①,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b40c2b0ab8e1cfe5112d428b4b829f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b265d121f9ebc13671a5719604476a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d147ae31f9d0cceb805e31a6cda3db0.png)
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(3)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c55651c2001c40835a06c82e77632210.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb49df05f2e31d005735c3f14a21d30.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,在正方形
中,点
是
上的一点,点
是
延长线上的一点,且
,连接
、
、
.求证:
是等腰直角三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92034dd2bb9480b18709d01153467f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/24/1330f7a0-0cb3-4747-8c7e-d8ff96d409a6.png?resizew=209)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】【问题背景】如图1,
,
均为等边三角形.求证:
;
【解决问题】
为等边三角形,点D在边AB上,点E是边AC上一个动点(不与点A,点C重合),以DE为边作等边
.
①如图2,若点D与点B重合,点G在BA延长线上,且
.试探索线段CF,AG,AB之间有何数量关系?并证明你的结论;
②如图3,若
的边长为5,
.求AD的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb49df05f2e31d005735c3f14a21d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a668fcb9a29eebda06220828d3b0877d.png)
【解决问题】
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
①如图2,若点D与点B重合,点G在BA延长线上,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2e2cb8956c9e4695f506e9d0b3e1292.png)
②如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efbc0e76b7abb656327bdc97226713e1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/98aa6e65-d313-408d-9c0c-6eec4873eec0.png?resizew=450)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,在等边△ABC中,点D,E分别在边BC,AC上,且BD=CE,AD,B
E相交于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/28/40ccbfc6-43ea-4490-ae7b-3fda8dd3a28f.png?resizew=183)
(1)求证:AD=BE;
(2)求∠AFE的度数.
![](https://img.xkw.com/dksih/QBM/2017/5/19/1690208152788992/1691934428848128/STEM/8ee8e41626fa4f3297a5d9f9c6347115.png?resizew=2)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/28/40ccbfc6-43ea-4490-ae7b-3fda8dd3a28f.png?resizew=183)
(1)求证:AD=BE;
(2)求∠AFE的度数.
您最近一年使用:0次