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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: ∘ |