Math Definitions - Letter L


Definition of Line

Definition of Line

A line is a long, thin mark that you can draw using a pencil and paper.

In geometry, we mean more specific things by "line". A line must have the following properties:

  • They are straight and do not include any curves.
  • The have no breadth (thickness).
  • They extend infinitely in both directions.

Lines which have two end-points (one at each end) are called line segments. Lines that have one end point, but extend infinitely in the other direction are called rays.


The aim of this dictionary is to provide definitions to common mathematical terms. Students learn a new math skill every week at school, sometimes just before they start a new skill, if they want to look at what a specific term means, this is where this dictionary will become handy and a go-to guide for a student


Year 1 to Year 12 students

Learning Objectives

Learn common math terms starting with letter L

Author: Subject Coach
Added on: 6th Feb 2018

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