已知:如图,
平分
,
平分
.若
,
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0e1e2a60c37ebc303d4fc2bf3d6a234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c6dad6e2f1b5ca8e72b5c166c020bc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7da595406d89ce8a442ee27a12eec9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54f51d0f39a59c3b7d6d8422c802fee1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/24/2271678a-0aec-4720-97de-9c3f24505b7e.png?resizew=161)
更新时间:2023-07-21 10:38:00
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】(1)特例感知:如图①,已知线段
,线段
在线段
上运动,
分别是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/c7f69099-347a-46f5-8719-cdc2ef2d3be1.png?resizew=430)
(1)①若
,则
_______
.
②在线段
的运动过程中,线段
的长度是否发生变化?如果不发生变化请求出
的长度,如果发生变化,请说明理由.
(2)知识迁移,我们发现角的很多规律和线段一样,如图②,已知
在
内部转动,射线
和射线
分别平分
和
.
①若
,则
_______
;
②请你猜想
和
三个角之间有怎样的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae2de86ef85ff419d93b07083dce52ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e4d7503a7d57ba242ad4e05c7006a0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/c7f69099-347a-46f5-8719-cdc2ef2d3be1.png?resizew=430)
(1)①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6714335aee0db9360b399d7a0ce1a71a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ec5d678ec42846e1d28301e3bfd4be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
②在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)知识迁移,我们发现角的很多规律和线段一样,如图②,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f92f279be7c8a11dcd2c0a97116bdcbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2f7bab4ed36ec5d04db3aeed2796f2.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/918d3b0d9cab103cf65a2d6e7fd53781.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45739116f428f7c6c5964de72a1fa101.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
②请你猜想
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f720e8cf51e0672e8acffd57f57ba4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】有一张正方形纸片
,点E是边
上一定点,在边
上取点F,沿着
折叠,点A落在点
处,在边
上取一点G,沿
折叠,点B落在点
处.
(1)如图,当点
落在直线
上时,猜想两折痕的夹角
的度数并说明理由.
(2)当
时,设
.
①试用含x的代数式表示
的度数.
②探究
是否可能平分
,若可能,求出此时
的度数;若不可能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/13/840293f1-7e5b-40bf-8007-0f869e191477.png?resizew=292)
(1)如图,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/968b886a9f161fdcab1e08cba8ece5d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d335bf8cb2e6e5e50d0e03a14d1f48d4.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61cabc18cfff351e1836b35490bfce45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bdf1f7e321ad50f47a8a5a5354a9b2a.png)
①试用含x的代数式表示
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d335bf8cb2e6e5e50d0e03a14d1f48d4.png)
②探究
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f3a9293c39b2595efa1347c541daa95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d335bf8cb2e6e5e50d0e03a14d1f48d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d335bf8cb2e6e5e50d0e03a14d1f48d4.png)
您最近一年使用:0次