Home Page

Cotmanhay Junior School

Safe, Happy Learning

Week 8 - 9 Properties of shape

National curriculum content

  • Compare and classify geometric shapes, including quadrilaterals and triangles, based on their properties and sizes
  • Identify acute and obtuse angles and compare and order angles up to two right angles by size
  • Identify lines of symmetry in 2-D shapes presented in different orientations
  • Complete a simple symmetric figure with respect to a specific line of symmetry


Lesson objectives

  1. Recap – Turns and angles
  2. Recap – Right angles in shapes
  3. Recap – Compare angles
  4. Identify angles
  5. Compare and order angles
  6. Recognise and describe 2-D shapes
  7. Triangles
  8. Quadrilaterals
  9. Symmetry
  10. Recap – Horizontal and vertical
  11. Lines of symmetry
  12. Complete a symmetric figure


What we want children to know

  • Know angles are a measure of a turn.
  • Know that a right angle is a quarter turn, 2 right angles make a half-turn, 3 right angles make three-quarters of a turn and 4 right angles make a complete turn.
  • Identify whether an angle is greater than or less than a right angle in shapes and turns, by measuring, comparing and reasoning in practical contexts.
  • Learn that an acute angle is more than 0 degrees and less than 90 degrees, a right angle is exactly 90 degrees and an obtuse angle is more than 90 degrees but less than 180 degrees.
  • Recognise, describe and draw 2-D shapes accurately.
  • Classify triangles using the names ‘isosceles’, ‘scalene’ and ‘equilateral’.
  • Identify and find horizontal and vertical lines in a range of contexts.
  • Find and identify lines of symmetry within 2-D shapes.



What skills we want children to develop

Use knowledge to solve reasoning and problem solving questions such as:


Concrete and Pictorial Resources

Look at the hands of the clock.

Turn the minute hand one quarter of a turn clockwise. Where is the large hand pointing? What is the new time?


Real Life Maths

Children create a ‘Right Angle Tester.’

They can then go on a right angle hunt around school. Find and draw at least 3 right angles you have seen around your school.



Teddy describes a shape.

Teddy says, “My shapes has 3 right angles and 2 obtuse angles.”

What could Teddy’s shape look like?

 Describe a shape in terms of its angles for a friend to draw.


Mathematical Talk

  • If we start by facing ________ and make a _______ turn, what direction will we be facing?
  • Where can you see a right angle in the classroom/ around school/ outside?
  • Which shapes contain right angles?
  • Can you see an acute/obtuse angle around the classroom?
  • How many degrees are there in a right angle?
  • Draw an acute/obtuse angle.
  • How many angles does a _______ have?
  • What are the names of the different types of triangles?
  • Can you draw your own shape that has a horizontal and vertical line of symmetry?
  • Explain what you understand by the term ‘symmetrical’.