Sides and vertices on 2D shapes

Learning focus

Learn about the properties of 2D shapes.

This lesson includes:

  • a catch-up quiz
  • two videos
  • a learning summary
  • an activity


To get started, let's see how well you know this topic already. Take the catch-up quiz below to find out.


Watch this video from KS1 Maths that explores the properties of some 2D shapes.

Properties of 2D shapes

Here are three 2D shapes. What properties do they have?

2D shapes have sides and vertices.

A vertex is a point where two or more lines meet. The plural of vertex is vertices.

Let's have a look at the properties of these shapes.


The triangle has 3 sides and 3 vertices.


The square has 4 sides and 4 vertices.


The hexagon has 6 sides and 6 vertices.


A 2D shape is a flat shape with sides, vertices and sometimes lines of symmetry.

If the sides and vertices on a shape are all the same, the shape is regular.

Before we move on to some activities, watch this fun song that will help you remember all about 2D shapes.

Top tip

You can count the number of sides or the number of vertices on a 2D shape – they are both the same!


Activity 1

2D shape hunt

Let's see what 2D shapes we can find around the house.

You will need a pencil and a piece of paper.

Look around the house for 2D shapes. Draw them on your piece of paper.
Can you draw and label:

  • the sides
  • the vertices


Play Guardians: Defenders of Mathematica to learn more about this topic and test your skills.

Guardians: Defenders of Mathematica

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