AB is a line segment which is inclined to line XY, such that they intersect at point O. A line PQ is drawn which intersects the line XY at point P at the same angle of inclination as AB. Line PQ is _________ to line segment AB.
parallel
The angle made by line segment AB and line PQ with line XY are equal. Therefore, by the corresponding angles postulate, the line segment AB is parallel to PQ.