👉 In mathematics, formerness is a property that relates the number of sides of a polygon to its interior angles. It describes how many sides a polygon must have in order for it to be considered "formal" or "closed". A regular polygon with n sides has (n-2) right angles and (n-2)
(n-4)/2 = 2
(n-3)
n/2 = (n^2 - 7n + 12)/(n-2