名校
1 . 如图,某住宅小区的平面图呈圆心角
为的扇形
,小区的两个出入口设置在点
及点
处,且小区里有一条平行于
的小路
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/f0303d3b-69dc-43d0-bb29-f35d9dd51555.png?resizew=212)
(1)已知某人从
沿
走到
用了
分钟,从
沿
走到
用了
分钟,若此人步行的速度为每分钟
米,求该扇形的半径
的长(精确到
米)
(2)若该扇形的半径为
,已知某老人散步,从
沿
走到
,再从
沿
走到
,试确定
的位置,使老人散步路线最长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c49eebe6f8dfb225b51acdb0290bf8ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3f57f005a9592ea89ae2a2cee6598c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/924497afe7626e8cbad1fb3b9723184f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/f0303d3b-69dc-43d0-bb29-f35d9dd51555.png?resizew=212)
(1)已知某人从
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3f57f005a9592ea89ae2a2cee6598c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/782a7b8656a7ad52519d7f2079ed6114.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec00b28e3a25c4025287d877b7483f25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c49eebe6f8dfb225b51acdb0290bf8ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e6f1af4b44b2e97e8f319bab4ae9010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
(2)若该扇形的半径为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30fbeb2f1f6ee7279885520d889bfc47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3f57f005a9592ea89ae2a2cee6598c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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2019-07-09更新
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1177次组卷
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3卷引用:上海市复旦大学附属中学2023-2024学年高二上学期开学考试数学试题