1) Use the Line tool[icon]/images/ggb/toolbar/mode_join.png[/icon] to create a line that goes through point P and intersects with the given line.[br]2) Copy the angle formed by your new line and the given line onto your new line with point P as the vertex.[br]3) Verify the lines are parallel by using the Angle Measure tool[icon]/images/ggb/toolbar/mode_angle.png[/icon] and showing two corresponding congruent angles.