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1:20是多少度
更新时间： 2020-11-04 00:00:00  

如果坡比是1:20，坡角约等于2.8624度。假设方法如下：tana=1/20=0.05，a=arctan0.05≈2.8624度。坡比，即坡面的垂直高度h和水平宽度l的比，即坡角的正切值(tan∠a值∠a为斜坡与水平面夹角)。「亦即tan∠α」。通常用“i”表示。

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