题型:解答题-问答题
难度:0.85
引用次数:1091
题号:18447286
如图
,将长方形纸片
沿
折叠得到图
,点A,
的对应点分别为点
,
,折叠后
与
相交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/6/77309c76-84a8-4644-9ab6-ab5db5d48c75.png?resizew=340)
(1)若
,求
的度数.
(2)设
,
.
①请用含
的代数式表示
.
②当
恰好平分
时,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42198b8e646ccfbbec323fd364c4d90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/6/77309c76-84a8-4644-9ab6-ab5db5d48c75.png?resizew=340)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2afdcf125da79be7823d136ade298b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f590d47f2ab4cbbb09d71bc02cd99897.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd9d226dc13e23ca8cab3f6e79131edb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1aadc17eb68abbc27cf205b95f28661.png)
①请用含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35ee685a6d4799b0ba7e114a3906c0c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbe9b60364e489347f264cc3d8c30e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f590d47f2ab4cbbb09d71bc02cd99897.png)
更新时间:2023-03-20 11:39:46
|
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【推荐1】请仔细观察如图所示的折纸过程,然后回答下列问题:
(1)
的度数为 ;
(2)
与
的数量关系为 ;
(3)若
,直接写出
和
的度数.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/9/7a5f514c-36e6-4e74-b7a3-da293cf6344e.png?resizew=539)
(1)
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(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a55a1a244f81097e05e715b69580faa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b53a92b465cdbfa308a8bd5e35d2bd27.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1b66354646c2186ab40e7439e659010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b53a92b465cdbfa308a8bd5e35d2bd27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73f68e4414c9ab464bf433385c03705f.png)
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
【推荐2】如图,在长方形
中,E是
的中点,将
沿直线
折叠后得到
,延长
交
于点F,连接
,若
,
.
(1)求证:
;
(2)求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37dcb0289f28b8e5c6aa8e9c1adb804b.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89229463a014065f5a82efd5bc7523be.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/28/8341aef2-3f1c-4dd2-91b2-9748eb37c92c.png?resizew=185)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/435df59aa690a46e3be711fcb7f6ee12.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
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