如图所示,已知∠AOB=40°,现按照以下步骤作图:①在OA,OB上分别截取线段OD,OE,使OD=OE;②分别以D,E为圆心,以DE长为半径画弧,在∠AOB内两弧交于点C;③作射线OC;④连接DC、EC.则∠OEC的度数为________ .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/0504f40d-d5f0-4c4c-8a59-f4c6c64dc5ca.png?resizew=198)
2021九年级·广东·专题练习 查看更多[5]
(已下线)必刷卷05-2021年中考数学考前信息必刷卷(广东专用)(已下线)广东卷06—2021年《三步冲刺中考·数学》(广东专版)之第3步中考热身卷吉林省长春市吉林大学附属中学2021-2022学年八年级上学期期末数学试题(已下线)广东省深圳市深圳中学初中部2022-2023学年八年级上学期期末考试数学试卷广东省深圳市深圳高级中学初中部2023-2024学年八年级下学期开学考试数学试题
更新时间:2021-04-28 12:05:03
|
相似题推荐
填空题
|
适中
(0.65)
名校
【推荐1】如图:作∠AOB的角平分线OP的依据是_____ .(填全等三角形的一种判定方法)
![](https://img.xkw.com/dksih/QBM/2019/9/6/2285045787287552/2287926985900032/STEM/a65ba757da0f4a1595ce366e10564f1c.png?resizew=158)
您最近一年使用:0次
填空题
|
适中
(0.65)
名校
【推荐2】如图,在
中,
,以点
为圆心,适当长为半径作弧,交
于
两点,再分别以
两点为圆心,大于
的长为半径作弧,两弧相交于点
,作射线
交
于点
,则点
与线段
上的点的连线中,长度最短的线段的长为___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2acaf09bbe770f4ce6404436eac612f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e58e08ee0b2580a62cf20f709b5e90df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94e1ca12da27075e5241b7c7ce74672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/8/45922bbd-39ab-49c0-b3fe-efb67a4ade56.png?resizew=167)
您最近一年使用:0次
填空题
|
适中
(0.65)
【推荐1】如图,在菱形
中,
,
.以点
为圆心,
的长为半径画弧
,则图中阴影部分的面积为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714cc3707bba3bfdb56e251999be8592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd6ffb78dad3375efa3b08ab518553d.png)
![](https://img.xkw.com/dksih/QBM/2022/4/27/2967074982813696/2970895964135424/STEM/4169d2bf-2eef-4ac7-9f76-12923e2130a2.png?resizew=220)
您最近一年使用:0次
填空题
|
适中
(0.65)
【推荐2】如图,等边△ABC中,D为AC的中点,点E在BC的延长线上,点F在AB上,∠EDF=120°,若AB=4,则
=___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1893b7bb1495598db815b6f9ef2dd1c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/13/c6890ae6-68a8-43ae-9bd8-1fe687a19efb.png?resizew=201)
您最近一年使用:0次