# Discuss and compare polygons

I can discuss and compare the shape and size of polygons, and the vertices of polygons.

# Discuss and compare polygons

I can discuss and compare the shape and size of polygons, and the vertices of polygons.

## Lesson details

### Key learning points

- Polygons can be compared by looking at their properties such as number of sides or vertices.
- The space inside polygons can be described using informal language such as long, thin, short, wide, larger and smaller.
- The vertices of a polygon can be described and compared using informal language such as sharp, pointy, wide and large.

### Common misconception

Children may think that a shape must be larger because it is wider or longer than another shape, or that the smallest shape should always be the shortest or narrowest.

Encourage children to focus on the amount of space that a shape takes up. Explore cutting up shapes and manipulating them so that they have the same width or length to help children see which is the largest or smallest shape overall.

### Keywords

Larger - A larger shape is one that takes up more space than another.

Smaller - A smaller shape is one that takes up less space than another.

Compare - You compare to find out what is the same and what is different.

### 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).

## Video

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## Starter quiz

### 6 Questions

pentagon

octagon

quadrilateral

triangle

3 sides and 3 vertices

4 sides and 4 vertices

5 sides and 5 vertices

6 sides and 6 vertices

8 sides and 8 vertices

## Exit quiz

### 6 Questions

a square-corner vertex

a sharp, pointy vertex

wide vertex