Community
Line.Closed = true/false
To determine if a list of lines can create a closed figure is similar to a surveyor determining if a traverse closes. For each line determine the delta X and the delta Y. If the sum of the delta X and the sum of the delta Y both equal zero. Then the list of lines creates a closed figure. The square root of the (sum of the delta X) squared plus the (sum of the delta Y) squared is known as the "Error of Closure".
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