In these lessons, we will learn how pairs of lines
to each other in four different ways intersecting
, parallel lines
These concepts are
useful for understanding and solving various geometry problems.
More lessons on Geometry
Intersecting lines are lines that meet at a point.
When two lines intersect, they define angles
at the point of intersection.
at point C
The following video gives a definition of intersecting lines.
Parallel lines are lines that never intersect. The distance between
the two lines is fixed and the two lines are going in the same direction.
||Two parallel lines
can be written as
The following video gives a definition of parallel lines.
Parallel lines are coplanar lines that do not intersect.
Perpendicular lines are lines that intersect
at one point and form a 90° angle.
The following video gives a definition of perpendicular lines.
Parallel, Perpendicular & Intersecting Lines Song
Song to help you remember what are parallel, perpendicular and intersecting lines.
Parallel lines never meet;
Intersecting lines make v’s;
Perpendicular lines meet at 90 degrees;
Put your hands in the air with me!!
The above relationships between lines take place on the same plane.
However, skew lines only happen in space.
Skew lines never intersect because they are not on the same plane.
Skew lines are difficult to draw because they exist in the three
dimensional space. Lets consider a cube.
||Imagine the lines
along the edges of a cube as shown, and line
running on the front surface of the cube.
They are lines in different planes and will never intersect.
The following video gives a definition of skew lines.
Difference between parallel lines and skew lines.
Parallel lines are two coplanar lines that never intersect.
Skew lines are lines that are not coplanar and can never intersect.
Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.
You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.
We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.