Use knowledge of shape properties to sketch and identify shapes | Maths

Starter quiz

Match the shape to the correct name.
- A
  
  ⇔
  
  hexagon ✓
- B
  
  ⇔
  
  square ✓
- C
  
  ⇔
  
  pentagon ✓
- D
  
  ⇔
  
  octagon ✓
Select all of the squares.
Select all of the regular polygons.
Is this a 2D shape? Select the best answer and reason.
- Yes. It is a quadrilateral.
- No. It is a 3D shape.
- No. It is not closed. ✓
Select all of the statements that are true of regular polygons.
- They are two-dimensional, closed shapes. ✓
- They are sometimes three dimensional.
- They have all straight sides. ✓
- No sides are equal in length.
- All interior angles are equal. ✓
Which of these shapes has right angles?

Exit quiz

Match the number of sides to the shape name.
- 3 equal sides
  
  ⇔
  
  regular triangle ✓
- 4 equal sides
  
  ⇔
  
  square ✓
- 5 equal sides
  
  ⇔
  
  regular pentagon ✓
- 6 equal sides
  
  ⇔
  
  regular hexagon ✓
- 7 equal sides
  
  ⇔
  
  regular heptagon ✓
Match the quadrilateral to the correct name.
- A
  
  ⇔
  
  kite ✓
- B
  
  ⇔
  
  trapezium ✓
- C
  
  ⇔
  
  rhombus ✓
Match the triangle to the correct name.
- A
  
  ⇔
  
  isosceles ✓
- B
  
  ⇔
  
  equilateral ✓
- C
  
  ⇔
  
  scalene ✓
Tick all of the statements that are true of this trapezium.
- It is a polygon. ✓
- It has three right angles.
- It is a pentagon.
- It is irregular. ✓
Tick all of the statements that are true of this shape.
- It is a polygon. ✓
- It has three acute angles. ✓
- It is a scalene triangle.
- It is regular.
Tick all of the statements that are true of this shape.
- It is a regular polygon.
- It is a heptagon. ✓
- It has at least one obtuse angle.

Worksheet

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Presentation

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Lesson Details

Key learning points

Regular shapes have all sides the same length and all angles equal size.
Knowledge of properties of shapes helps to sketch shapes.
Knowledge of properties of shapes helps to identify shapes.

Common misconception

Pupils might get confused by shapes which are almost polygons - for example, one of the lines is slightly curved - or almost regular - for example, one side is slightly longer than the others.

These are either not polygons or are irregular polygons. Ensure pupils are clear about that. Examples and non-examples are given, including 'almost' examples. You may wish to include more and display these in your Maths environment.

Keywords

Regular - A regular polygon has all sides equal and all angles equal.
Irregular - An irregular polygon does not have all sides equal and does not have all angles equal.