Parallel Lines - Definition with Examples

The Complete K-5 Math Learning Program Built for Your Child

  • 40 Million Kids

    Loved by kids and parent worldwide

  • 50,000 Schools

    Trusted by teachers across schools

  • Comprehensive Curriculum

    Aligned to Common Core

Parallel Lines Games

Parallel and perpendicular lines
Parallel and Perpendicular Lines

Parallel lines are lines that never meet and perpendicular lines meet at right angles. Recognize pairs of parallel or perpendicular lines.

Covers Common Core Curriculum 4.G.1Play Now

What are parallel lines ? 

In geometry, parallel lines can be defined as two lines in the same plane that are at equal distance from each other and never meet. 

Here, three set of parallel lines have been shown - vertical, diagonal and horizontal parallel lines.

Parallel lines in geometry

Sides of various shapes are parallel to each other. Parallel lines are represented with a pair of vertical lines between the names of the lines, such as PQ ︳︳XY.

We can see parallel lines in a zebra crossing, the lines of notebook and in railway tracks around us. 

Parallel lines real life examples around us

  Fun Facts

  • Each line can have many parallel lines to it. 
  • Parallel lines can be extended indefinitely, with out them intersecting at any point. 

let's sing Let's sing!

Draw parallel lines on a sheet,
Use a ruler to to make them neat!
Make sure their ends nevers meet!

let's do it Let's do it!

Ask your children to observe things around them in which they can find parallel lines. You can further ask them to identify the parallel side to the side you are pointing, for instance, you can stand on end of the dining table, and ask them to identify the side which is parallel to it. 

related math vocabulary Related math vocabulary

Won Numerous Awards & Honors
Awards honors badge