OR OR (never touch) Perpendicular (intersect at right angles) Parallel Lines on the same plane (same flat surface) are either: Intersecting (will touch) Lines that intersect forming 90 degree angles are perpendicular lines. Intersecting ? Perpendicular ? Parallel ? skew lines Skew lines lie on separate planes. Although they are not parallel, they do not intersect. The orange lines are skew lines Parallel (same plane, never touch) Perpendicular (same plane, intersect at 90º angles) Skew (different planes, never touch) The orange lines are: ∘ Parallel (same plane, never touch) Perpendicular (same plane, intersect at 90º angles) Skew (different planes, never touch) The orange lines are: ∘ Parallel (same plane, never touch) Perpendicular (same plane, intersect at 90º angles) Skew (different planes, never touch) The orange lines are: ∘ Parallel (same plane, never touch) Perpendicular (same plane, intersect at 90º angles) Skew (different planes, never touch) The orange lines are: ∘ Parallel (same plane, never touch) Perpendicular (same plane, intersect at 90º angles) Skew (different planes, never touch) The orange lines are: ∘ Perpendicular (same plane, intersect at 90º angles) Parallel (same plane, never touch) Skew (different planes, never touch) The orange lines are: ∘ Perpendicular (same plane, intersect at 90º angles) Parallel (same plane, never touch) Skew (different planes, never touch) The orange lines are: ∘ Parallel (same plane, never touch) Perpendicular (same plane, intersect at 90º angles) Skew (different planes, never touch) The orange lines are: ∘ Parallel (same plane, never touch) Perpendicular (same plane, intersect at 90º angles) Skew (different planes, never touch) The orange lines are: ∘ Parallel (same plane, never touch) Perpendicular (same plane, intersect at 90º angles) Skew (different planes, never touch) The orange lines are: ∘ Parallel (same plane, never touch) Perpendicular (same plane, intersect at 90º angles) Skew (different planes, never touch) The orange lines are: ∘ |