Let be a polygon, and we add CCW direction to its boundary . Let us measure the angle along each edge of the polygon for where N is the number ...

The least aligned ray to the edges of a planar polygon – math.stackexchange.com
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Let P be a polygon, and we add CCW direction to its boundary ∂P. Let us measure the angle θi along each edge of the polygon for i=1,...,N where N is the number ...