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Identifying parallel and perpendicular lines

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Summary

Identifying parallel and perpendicular lines

​​In a nutshell

There are pairs of lines that have relationships to each other that are useful to know. Perpendicular lines are at a 90°90\degree angle to each other. Parallel lines never touch and stay the same distance away from each other.​



Perpendicular lines

When a line meets another at an angle of  90°90\degree, the lines are perpendicular. Examples of perpendicular lines are the corners of a piece of paper.

Maths; Geometry - properties of shapes; KS2 Year 3; Identifying parallel and perpendicular lines



Parallel lines

When two lines stay the same distance apart and never touch, they are parallel. A pair of train tracks are parallel lines, for example.


Maths; Geometry - properties of shapes; KS2 Year 3; Identifying parallel and perpendicular lines


​​Example 1

Are these lines perpendicular or parallel to each other?


Maths; Geometry - properties of shapes; KS2 Year 3; Identifying parallel and perpendicular lines


These lines touch so they cannot be parallel lines.

They meet at a 90°90\degree angle, so:

The lines are perpendicular to each other.

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FAQs - Frequently Asked Questions

What are parallel lines?

What are perpendicular lines?

What is an example of parallel lines?

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