Lines are closed profile or not

[samiranjith1]

if i have list of lines, How to check those lines can make a closed profile or not  ?

[jabowabo]

Line.Closed = true/false

[hippe013]

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".