如图,以点O为圆心,任意长为半径画弧,与射线
交于点A,再以点A为圆心,
长为半径画弧,与前弧交于点B,画出射线
,则
的度数____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/d6ee44d0-2971-4d4f-862e-794663c2dd83.png?resizew=151)
更新时间:2024-01-09 14:56:37
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【推荐1】如图,请用尺规在线段
下方作一点P,使得
平分角
,且
,(保留作图痕迹,不写作法)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐2】如图
,在射线
上取
,在射线
上取
,连接
,以点
为圆心,
为半径画弧,交
于点
,以
为圆心,
为半径画弧,交
于点
,则
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a563c50a7f6d10fa46339d7107fc85e.png)
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【推荐2】如图,有一个半径为2的圆形时钟,其中每个刻度间的弧长均相等,过9点和11点的位置作一条线段,则钟面中阴影部分的面积为________ .
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