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.

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.

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.

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.

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).

Lesson video

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6 Questions

Q1.
Which of these shapes are polygons?
Correct answer: a
b
c
Correct answer: d
Q2.
Which of these shapes are not polygons?
Correct answer: a
b
Correct answer: c
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?
An image in a quiz
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.
An image in a quiz
Correct Answer: 12, twelve
Q6.
Which polygon should not be part of this set? Polygon .
An image in a quiz
Correct Answer: c

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

Correct Answer:quadrilaterals,have 4 vertices and 4 straight sides

have 4 vertices and 4 straight sides

Q2.
Which of these shapes is not a triangle?
a
b
Correct answer: c
d
Q3.
Which of these shapes are quadrilaterals?
a
b
Correct answer: c
Correct answer: d
Q4.
Which shape should not be part of this set?
An image in a quiz
a
Correct answer: b
c
d
Q5.
This shape is a quadrilateral and also a .
An image in a quiz
Correct Answer: square
Q6.
This shape is not a triangle because...
An image in a quiz
Correct answer: it does not have 3 straight sides.
it is a quadrilateral.
Correct answer: it does not have 3 vertices.