如图,风景区的形状是如图所示的扇形ABC区域,其半径为2千米,圆心角为
,点P在弧BC上.现欲在风景区中规划三条商业街道
,要求街道PQ与AB垂直(垂足Q在AB上),街道PR与AB平行,交AC于点R.
![](https://img.xkw.com/dksih/QBM/2021/5/1/2711564111142912/2772377853075456/STEM/01b4186de288417badbd3a71d1f4f6aa.png?resizew=227)
(1)如果P为弧BC的中点,求三条商业街道围成的△PQR的面积;
(2)试求街道RQ长度的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e93c98be6da91f6a1a39d3bf88f0301.png)
![](https://img.xkw.com/dksih/QBM/2021/5/1/2711564111142912/2772377853075456/STEM/01b4186de288417badbd3a71d1f4f6aa.png?resizew=227)
(1)如果P为弧BC的中点,求三条商业街道围成的△PQR的面积;
(2)试求街道RQ长度的最小值.
20-21高一下·江苏扬州·期中 查看更多[5]
江苏省扬州市邗江中学2020-2021学年高一下学期期中数学试题广东省广州市铁一中学2022-2023学年高一上学期期末数学试题江苏省南通市通州区金沙中学2022-2023学年高一下学期4月质量监测数学试题(已下线)第五章 三角函数(32类知识归纳+38类题型突破)(6) -速记·巧练(人教A版2019必修第一册)江苏省苏州市桃坞高级中学校2023-2024学年高一下学期3月自学能力测试数学试卷
更新时间:2021-07-26 08:40:05
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