如图,点
是半圆圆心,
是半圆直径,点
在半圆上,且
,
,
,则阴影部分的面积是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65436512ecbaefba4ac8123c55094211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96fe32d9cbcdb4e63a341f85fcd9ca70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80470ada6d25bae9c8b5059767e382c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/8/73c97b98-a421-4c60-8757-a22ff8f22736.png?resizew=168)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2023-09-09 13:04:02
|
【知识点】 图形的性质
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【推荐1】如图①,点
从
的顶点
出发,沿
匀速运动到点
,图②是点
运动时,线段
的长度
随时间
变化的关系图象,其中
是曲线部分的最低点,则
的面积是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/3/7491ad95-2e71-4ece-8994-2a873e43c1d0.png?resizew=386)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7012d1ff11db5e150182e19646814cd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/3/7491ad95-2e71-4ece-8994-2a873e43c1d0.png?resizew=386)
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【推荐2】如图1,在平面内选一定点O,引一条有方向的射线Ox,再选定一个单位长度,那么平面上任一点M的位置可由∠MOx的度数θ与OM的长度m确定,有序数对(θ,m)称为M点的“极坐标”,这样建立的坐标系称为“极坐标系”.在图2的极坐标系下,如果正六边形的边长为2,有一边OA在射线Ox上,则正六边形的顶点C的极坐标应记为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/15/bb7a206c-c574-4e2f-a814-4aa7819f9a88.png?resizew=230)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/15/21166953-b113-4a2f-9c9c-a1f7dd92e671.png?resizew=230)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/15/bb7a206c-c574-4e2f-a814-4aa7819f9a88.png?resizew=230)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/15/21166953-b113-4a2f-9c9c-a1f7dd92e671.png?resizew=230)
A.(60°,4) | B.(45°,4) | C.(60°,2) | D.(50°,2) |
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