Symmetry

1. Symmetry Line Symmetry Rotation (Turn) Symmetry Creating Rotational Symmetry www.mathsrevision.com Translational Symmetry

2. Starter Questions Q1. Calculate Q2. If 1 bar of chocolate costs 65p. How much will 1000 bars cost. Give your answer in £’s. Q3. Round to 1 decimal place www.mathsrevision.com Q4. Convert to 24 hrs clock

3. Line Symmetry Learning Intention Success Criteria • Understand the term line symmetry. • We are learning how to recognise and create line symmetry. • Complete Drawings given the line of symmetry. www.mathsrevision.com

4. Line Symmetry A line symmetry occurs in a shape if, when the shape is folded over the line the two pieces either side of the line, are exactly the same. www.mathsrevision.com

5. Line Symmetry How many lines of symmetry do these shapes have ? Equilateral Triangle (3 lines) Square (4 lines)

6. Line Symmetry How many lines of symmetry do these shapes have ? Isosceles Triangle (1 lines) Rectangle (2 lines)

7. Line Symmetry How many lines of symmetry do these shapes have ? Kite (1 line) Rhombus (2 lines)

8. Line Symmetry How many lines of symmetry do these shapes have ? Parallelogram No lines of Symmetry

9. Line Symmetry How many lines of symmetry do these shapes have ? Trapezium 2 No line of Symmetry Trapezium 1 (1 line)

10. Line Symmetry How many lines of symmetry do these shapes have ? (2 lines) Hexagon (6 lines)

11. Line Symmetry Draw the other side of the shape so it has line symmetry.

12. Line Symmetry Draw the other side of the shape so it has line symmetry.

13. Line Symmetry Now try TJ4+ Ex 6.1 Ch6 (page 35) www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

14. Starter Questions Q1. Round the following to the first decimal place. (a) 153.37 (b) 261.55 Q2. What fraction is the green area. What fraction is the grey area. www.mathsrevision.com Q3. A pencil costs 22p. How much does a 1000 cost. Put your answer in £’s.

15. Rotation (Turn) Symmetry Learning Intention Success Criteria • Understand the terms rotational symmetry. • We are learning what rotational symmetry and its order. www.mathsrevision.com • 2. State the turn symmetry and order for shapes.

16. Rotation (Turn) Symmetry Draw the other side of the shape rotated through 180o around the red point. Order 2 means it looks the same twice as it is rotated through 360o. This new shape has half-turn symmetry ORDER 2.

17. Rotation (Turn) Symmetry State the turn symmetry for each and its order. Square (¼ turn symmetry) Order 4 Rectangle (½ turn symmetry) Order 2

18. Creating Half-TurnSymmetry Learning Intention Success Criteria • Understand the terms half-turn symmetry. • We are learning how we can create half-turn symmetry for a shape. • Draw the other half of a shape such that it has half-turn symmetry. www.mathsrevision.com

19. Creating Half -Turn Symmetry Draw the other side of the shape rotated through 180o around the red point. The final shape depends on the centre of rotation.

20. Creating Half -Turn Symmetry Draw the other side of the shape rotated through 180o around the red point.

21. Rotation (Turn) Symmetry Now try TJ4+ Ex 6.2 Ch6 (page 36) www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

22. Starter Questions Q1. Calculate Q2. What is the time difference between 8.15am and 1:00pm Q3. www.mathsrevision.com Q4. (-2) + (-3) Q5. How many lines of symmetry does regular hexagon have.

23. Translation (slide)Symmetry Learning Intention Success Criteria • Understand the terms translational, slide congruent and tile. • We are learning the meaning of Translational (slide) symmetry using tile patterns. www.mathsrevision.com • Identify shapes that tile. • Construct a tile pattern • for shapes.

24. Translation (Slide) Symmetry Gaps Gaps Using Slide Symmetry Shape tiles DOES NOT tiles Gaps between shapes A shape that tiles can be completely surrounded by congruent shapes WITHOUT leaving any gaps.

25. Translation (Slide) Symmetry How can you tell if the tiling is complete ?

26. Translation (Slide) Symmetry

27. Translation (Slide) Symmetry Complete the tiling Is this the complete tiling ? No ! Why ?

28. Translation (slide)Symmetry Write down as many tile patterns as you can that you see every day. www.mathsrevision.com

29. Have you updated your Learning Log ? Translation (Slide)Symmetry Now try TJ4+ Ex 6.3 Ch6 (page 38) www.mathsrevision.com Created by Mr. Lafferty Maths Dept.