水坝的横断面为梯形ABCD,迎水坡BC的坡角B为30°,背水坡AD坡比为1:1.5,坝顶宽DC=2米,坝高4米,求:
![](https://img.xkw.com/dksih/QBM/2011/12/27/1573318546718720/1573318552928256/STEM/874adf1f-1066-4e58-8618-462cfc02ce81.png)
(1)坝底AB的长;
(2)迎水坡BC的坡比.
![](https://img.xkw.com/dksih/QBM/2011/12/27/1573318546718720/1573318552928256/STEM/874adf1f-1066-4e58-8618-462cfc02ce81.png)
(1)坝底AB的长;
(2)迎水坡BC的坡比.
11-12九年级上·浙江衢州·阶段练习 查看更多[2]
更新时间:2016-12-05 06:27:42
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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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