This document discusses line symmetry in shapes and asks the reader to identify the number of lines of symmetry in various shapes. It explains that a shape has line symmetry if it can be divided by a line so that one half is the mirror image of the other half. Examples are given of shapes with 1, 2, 3, or more lines of symmetry, including that a square has 4 lines of symmetry. The reader is prompted to investigate what happens to the number of lines of symmetry when two shapes are joined together.

1. Line Symmetry Year 4

2. A shape has line symmetry if… You can draw a line through it so that one part is exactly the same as the other part.

3. These shapes have one line of symmetry

4. These shapes have two lines of symmetry

5. Some shapes have more than 2 lines of symmetry How many lines of symmetry has a square got?

6. Watch! A square has 4 lines of symmetry

7. How many lines of symmetry does this shape have? 0 1 2 More than 2

8. Watch! This shape has 1 line of symmetry

9. Well done!

10. But how many lines of symmetry does this shape have? 0 1 2 More than 2

11. Watch! This shape has 2 lines of symmetry

12. Well done!

13. How many lines of symmetry does this shape have? 0 1 2 More than 2

14. Watch! This shape has 3 lines of symmetry

15. Well done!

16. But how many lines of symmetry does this shape have? 0 1 2 More than 2

17. Watch! This shape has only 2 lines of symmetry

18. Well done!

19. What happens when… … you join two shapes together? Investigate.