Corner-to-corner edges can serve as ridges and valleys.
角和角之间的边界线可以作为山谷。
Three roughly defined corner edges are then acquired that define an approximately equilateral triangle pointed at the center of the image.
随后将获得三条粗略定义的角边，用于定义指向图像中心的近似的等边三角形。
Edge Angles - If this is selected the Angle in degrees will be drawn near the corner of two selected edges. The edges must be connected to the same corner.
边角度：如果开启，将以角度在两个选择边的夹角显示该角的角度，边必须被连接形成一个角。
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