New
New
Year 2

# Describe and name polygons, including triangles and quadrilaterals

I can recognise and describe polygons including triangles and quadrilaterals.

New
New
Year 2

# Describe and name polygons, including triangles and quadrilaterals

I can recognise and describe polygons including triangles and quadrilaterals.

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## Lesson details

### Key learning points

1. The names of polygons are linked to the number of sides/vertices they have.
2. A quadrilateral is any polygon with 4 sides.
3. A triangle is any polygon with 3 sides.
4. Squares and rectangles are quadrilaterals.

### Common misconception

Children may mistake a 'triangle-like' shape for a triangle.

Provide opportunities to explore and handle cut-outs of triangles and triangle-like shapes. Describe and compare how the sides and corners feel. Touch the part of the shape that shows that it is not a triangle and explain how you know.

### Keywords

• Quadrilateral - A polygon with 4 sides and 4 vertices.

• Rectangle - A polygon with 4 sides and 4 'square corners'.

• Square - A polygon with 4 equal sides and 4 'square corners'.

• Triangle - A polygon with 3 sides.

When children are sorting shapes into sets, they would benefit from having cut-outs of shapes, as although not strictly 2D, they will be able to handle them when deciding which set to place each in.
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 these shapes are polygons?
b
c
Q2.
Which of these shapes are not polygons?
b
d
Q3.
Which of the statements are true for all polygons?
Correct answer: They have sides that meet at vertices.
They are 3D shapes.
Correct answer: They have three or more straight sides.
Correct answer: They are 2D shapes.
Q4.
What is the same about all of these polygons?
Correct answer: They all have 6 straight sides.
Correct answer: They all have 6 vertices.
They are all 3D shapes.
Q5.
This polygon has sides and vertices.
Q6.
Which polygon should not be part of this set? Polygon .

## Exit quiz

### 6 Questions

Q1.
Match the name of the shape with its properties.
Correct Answer:triangles,have 3 vertices and 3 straight sides

have 3 vertices and 3 straight sides

have 4 vertices and 4 straight sides

Q2.
Which of these shapes is not a triangle?
a
b
d
Q3.
Which of these shapes are quadrilaterals?
a
b
Q4.
Which shape should not be part of this set?
a