如图,在
ABC中,∠B+∠C=α,按图进行翻折,使
,则∠
FE的度数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3377141ef4f45b2acac3a7326a73b68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
A.![]() | B.90°﹣![]() | C.α﹣90° | D.2α﹣180° |
2021九年级·浙江·专题练习 查看更多[11]
(已下线)第17讲 三角形(讲练)-备战2021年中考数学一轮复习讲练测(浙江)(已下线)【新东方】 初中数学1225初二上山西省晋中市寿阳县2020-2021学年八年级上学期期末数学试题(已下线)【新东方】【2021.4.21】【绍兴】【初二上】【数学】【00010】(已下线)(河北卷)2021年中考数学第二次模拟考试(已下线)沪科版2021-2022学年八年级数学上册专题12 八年级上册期中模拟(三)(已下线)专题03 三角形折叠中的角度问题-【微专题】2022-2023学年八年级数学上册常考点微专题提分精练(浙教版)(已下线)第4课时 三角形内角和定理(分层练习)-2022-2023学年八年级数学上册同步精品课堂(北师大版)浙江省杭州市上城区北京师范大学附属杭州中学2020-2021学年八年级上学期期中数学试题(已下线)第01讲 认识三角形(知识解读+真题演练+课后巩固)-2023-2024学年八年级数学上册《知识解读·题型专练》(浙教版)(已下线)期中选择填空压轴必刷-2023-2024学年七年级数学下学期期中考点大串讲(北师大版)
更新时间:2021-03-17 09:51:13
|
相似题推荐
单选题
|
适中
(0.65)
【推荐1】如图,在给定钝角
中,在边
上取B,C,使
.点P从点A出发沿另一边射线
方向运动,将
沿
折叠,使点A落在角内点E处,连接
,则
的度数和的变化情况是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af2cc5f8cec8c498aa12c99c04e1c97d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d897e23bc2c11977deda90190b8460b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/7/b4ecf50a-3eb0-4a2a-90ed-ad921402c434.png?resizew=159)
A.一直增大 | B.一直减小 | C.一直不变 | D.先增大后减小 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】如图,在△ABC中,AB=AC,∠BAC=70°,∠BAC的平分线与AB的垂直平分线交于点O,点E、F分别在BC、AC上,点C沿EF折叠后与点O重合,则∠BEO的度数是( )
![](https://img.xkw.com/dksih/QBM/2018/5/16/1946564574306304/1946690644205568/STEM/67bb0530359d4648a0d70d0ea00de0fc.png?resizew=130)
![](https://img.xkw.com/dksih/QBM/2018/5/16/1946564574306304/1946690644205568/STEM/67bb0530359d4648a0d70d0ea00de0fc.png?resizew=130)
A.20° | B.35° | C.40° | D.55° |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】如图,三角形纸片
中,点D是
边上一点,连接
,把
沿着直线
翻折,得到
,
交
于点G,连接
交
于点F,若
,
,
,
的面积为
,则
的长是( )
![](https://img.xkw.com/dksih/QBM/2023/6/18/3262244917248000/3262885334245376/STEM/765f9405086c4cbfbe20acc6abea9d97.png?resizew=168)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](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/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c771a4feb150ad9cff8d70431c97eb17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a329bec5627bf0eb930d1406ac13e483.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0fc232acd89fc499de346969ce8ced1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00870385ca7f3214e2971779eb4c7904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ad9de54606c4a72d0f8decb6b0e63b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/2023/6/18/3262244917248000/3262885334245376/STEM/765f9405086c4cbfbe20acc6abea9d97.png?resizew=168)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】如图,将一个等腰直角三角形
按如图方式折叠,若
,
,下列四个结论:
①
平分
;
②
长为
;
③
是等腰三角形;
④
的周长等于
的长,
其中,正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/26/1875e9cf-e732-4017-b4a4-aba54fad9552.png?resizew=737)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cbee60fd68646f609fbb8c145262992.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5068b690ac4a15e3d3cdd545e0b9942.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/288abe01824f42cfe725509af5aec4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d3e081637bcea5368cc72370bae283b.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b0113fd4c7d157757571f9a009e02af.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46cea1f4861584aba9b0d551961c8fc7.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecd75c2244c18120b8fc35d5d309ab66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
其中,正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/26/1875e9cf-e732-4017-b4a4-aba54fad9552.png?resizew=737)
A.①②④ | B.②③④ | C.①②③ | D.①③④ |
您最近一年使用:0次