剪纸,又叫刻纸,是一种镂空艺术.如图,原纸片为一圆形,直径
,需要剪去四边形
,可以通过对折、沿
,
裁剪、展开实现. 已知点
在圆上,且
,
,则四边形
的面积为______________
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9040c9795e7132ebf65ede1f98c4d72b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8218b79327ef9307b66a417e18eb6699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bff10ef1a3022296cbc5a722f8540b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1df75d99a46c50d4d37c8c9d2a0f856d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8218b79327ef9307b66a417e18eb6699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ce13774b09ff2edddaf21a072cf60a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/19/ec72fad5-bf83-48ac-a25e-211f9c41d46f.png?resizew=524)
23-24高三上·贵州六盘水·阶段练习 查看更多[7]
贵州省六盘水市纽绅中学等校2024届高三上学期10月联考数学试题江西省部分学校2024届高三上学期10月月考数学试题贵州省部分学校2024届高三上学期10月联考数学试题贵州省黔东南州从江县第一民族中学2024届高三上学期10月月考数学试题河南省周口市项城市第一高级中学2023-2024学年高三上学期第四次段考数学试题(已下线)考点20 三角函数的数学文化 --2024届高考数学考点总动员【讲】(已下线)第11讲 6.4.3 第2课时 正弦定理 (2)-【帮课堂】(人教A版2019必修第二册)
更新时间:2023-10-30 08:42:10
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【推荐1】在
中,角A、B、C所对的边分别为a、b、c,已知
,
,
,则
的面积S=__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐2】如图,在矩形
中,已知
,
,点
,
分别在
、
上,且
.设
,当四边形
的面积取得最大值时,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85527d190d4e1d6bac4145d1c716e65e.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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【推荐2】设
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(
,
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