一段公路路面的坡度为
,如果某人沿着这段公路向上行走了130米,那么此人升高了___ 米.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1852175af2bff405159bc6b574dcb9f.png)
更新时间:2022-01-23 22:12:16
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【知识点】 坡度坡比问题(解直角三角形的应用)
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【推荐1】如图,某河堤的横断面是梯形ABCD,BC∥AD,已知背水坡CD的坡度i=1:2.4,CD长为13米,则河堤的高BE为_____ 米.
![](https://img.xkw.com/dksih/QBM/2011/7/7/1573221663637504/1573221735350272/STEM/8916b22830ac435fa3306c6815d198a5.png?resizew=173)
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【推荐2】在学习解直角三角形以后,某数学兴趣小组测量了旗杆的高度.如图,某一时刻,旗杆
的影子一部分落在平台上的影长
为
米,落在斜坡上的影长
为
米,
,同一时刻,光线与旗杆的夹角为
,斜坡的坡角为
,旗杆的高度
约为________________ 米.(参考数据:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77cf11fd3da48a5fbca22e6609cd7eeb.png)
,
,精确到
米)
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