Starter quiz
- When one half of a pattern is a reflection of the other half, the pattern is __________.
- symmetry.
- a line of symmetry.
- symmetrical. ✓
-
True or false. This pattern is symmetrical.- True
- False ✓
- How many vertices does a quadrilateral have?
- '4' ✓
- Which of these shapes are quadrilaterals?
- parallelogram ✓
- trapezium ✓
- pentagon
- hexagon
- rhombus ✓
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- Which of these statements are true for all quadrilaterals?
- They have four straight sides. ✓
- They have a line of symmetry.
- They have one right angle.
- They have two sides the same length.
- They have four vertices. ✓
-
- Match the description to the type of shape.
- Rectangle⇔A four-sided shape with four right angles. ✓
- Quadrilateral⇔Any four-sided shape. ✓
- Square⇔A four-sided shape with four right angles and four equal sides. ✓
Exit quiz
- When patterns and shapes are symmetrical, both sides are __________.
- identical. ✓
- different.
- halved.
-
True or false. These triangles are identical.- True
- False ✓
These shapes have been made using two identical triangles. Which shape does not have a line of symmetry?- a ✓
- b
- c
-
Izzy created shapes using trapeziums. Which shape does not have a line of symmetry?- a
- b
- c ✓
- d
-
True or false. This shape has more than one line of symmetry.- True ✓
- False
This shape is made from 2 parallelograms. How many lines of symmetry does it have?- 2
- 1
- 0 ✓
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Worksheet
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Presentation
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Video
Lesson Details
Key learning points
- A shape is symmetrical when one half is a reflection of the other half.
- When you fold a shape on a line of symmetry, the two halves will match exactly.
- You can join two identical shapes together to create a new shape.
- When you join two identical shapes, sometimes the new shape will be symmetrical.
- When you join two identical shapes, sometimes the new shape will have no lines of symmetry.
Common misconception
Some children will think that a parallelogram is symmetrical because it can be divided in half.
Demonstrate with folding and by using mirrors why dividing a parallelogram in half does not result in a line of symmetry. Allow children to explore this concept with cut-outs of different parallelograms.
Keywords
Symmetrical - When a shape, pattern or image has two halves that match exactly when folded, it can be described as symmetrical.
Line of symmetry - If you were to fold a shape at its line of symmetry, both halves would match exactly.
Identical - Two shapes that are exactly the same can be described as identical.
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