New
New
Year 2

# Recognise and sort polygons

I can explain what a polygon is and sort polygons in different ways.

New
New
Year 2

# Recognise and sort polygons

I can explain what a polygon is and sort polygons in different ways.

Share activities with pupils
Share function coming soon...

## Lesson details

### Key learning points

1. A polygon has straight sides.
2. The sides of a polygon meet at vertices.
3. A polygon is a 2D shape.
4. Polygons can be sorted in different ways.
5. Properties of polygons include the number of sides and the number of vertices.

### Common misconception

Some children might not count the sides or vertices accurately because they lose track of where they started counting.

Ask children how they can make sure they only count each side or vertex once. Model marking each side or vertex as you count it.

### Keywords

• Polygon - A 2D shape made up of 3 or more straight sides.

• 2D / two dimensional - A shape with only two measurable dimensions, e.g. width and length, but no thickness.

• Sides - The outside edges of a shape.

• Vertices - A vertex is the point where two lines meet. The plural is vertices.

Provide opportunities for children to handle and explore cut-outs of a wide range of polygons. Include examples with all sides and vertices the same, with some sides and vertices the same and some different and with all sides and vertices different.
Teacher tip

### Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

## Starter quiz

### 6 Questions

Q1.
Which of the shapes is the same as shape b?
Correct Answer: An image in a quiz
Q2.
Match the correct name to each shape.

rectangle

circle

triangle

Q3.
How can you describe each shape? Match the shape to the description.
Correct Answer:a,has four straight sides and four vertices

has four straight sides and four vertices

has one curved line

Correct Answer:c,has thee straight sides and three vertices

has thee straight sides and three vertices

Q4.
True or false. These shapes are all rectangles.
False
Q5.
True or false. A square is a type of rectangle.
False
Q6.
All of these shapes are .
circles
squares
rectangles

## Exit quiz

### 6 Questions

Q1.
These shapes are all polygons. Which of the statements are true for all polygons?
Correct answer: They have three or more straight sides.
Correct answer: They are 2D shapes.
They are 3D shapes.
Correct answer: They have sides that join at vertices.
Q2.
Which of these shapes are not polygons?
b
Q3.
True or false. This shape is a polygon.
True
Q4.
Which of these polygons have five sides?
a