圆心角
为
且半径长
为1cm的扇形的面积为( )![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2fd71602a033ee9871bd35952339117.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff7c5b84b70b86e66f80e2bf1336ff31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2fd71602a033ee9871bd35952339117.png)
A.15 | B.30 | C.![]() | D.![]() |
19-20高一上·江苏连云港·期中 查看更多[2]
更新时间:2022-10-28 20:31:50
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【推荐1】扇子最早称“翣”,其功能并不是纳凉,而是礼仪器具,后用于纳凉、娱乐、欣赏等.扇文化是中国传统文化的重要门类,扇子的美学也随之融入到建筑等艺术审美之中.图1为一古代扇形窗子,此窗子所在扇形的半径(图2)
,圆心角为
,且
为
的中点,则该扇形窗子的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8e3804e6a42e63435d3951eded2e00f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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