直角边直角三角形除斜边之外的两条边的任意一条。
纸的两个纸规边要成直角。
直角坐标网线值,通常均配置在图边。
Grid line values are usually placed in the margins of the map.
一凸多边形有七条边,但只有一个角是直角。
A particular convex polygon with seven sides has exactly one right Angle.
一凸多边形有七条边,但只有一个角是直角。
A particular convex polygon with seven sides has exactly one right Angle.
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