[b]Parallel Lines Proportionality Theorem:[/b][br][br]If 2 transversals intersects 3 [color=#666666][b]parallel lines[/b][/color], then the segments that are part of the transversal (located between the "outermost 2" [color=#666666][b]parallel lines[/b][/color] divide the both transversals into proportional parts.