Triangulation of a circuit

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Triangulation of a circuit --- триангуляция цикла.

This is a graph consisting of this circuit [math]\displaystyle{ C }[/math] and [math]\displaystyle{ n-3 }[/math] non-crossing interior diagonals ([math]\displaystyle{ n }[/math] is the length of [math]\displaystyle{ C }[/math]).