yr 7 rotation reflection Revision on.pptx

Revision for y7 On Rotation, reflection and other forms of Transformation

1. Shape Lines of Symmetry Shape Lines of Symmetry 1. Name _________________ 2. Name _________________ 3. Name _________________ 4. Name _________________ 5. Name _________________ 6. Name _________________ 7. Name _________________ 8. Name _________________

2. Shape Lines of Symmetry Shape Lines of Symmetry 1. Name _________________ 2. Name _________________ 3. Name _________________ 4. Name _________________ 5. Name _________________ 6. Name _________________ 7. Name _________________ 8. Name _________________ square rectangle equilateral triangle triangle cross trapezium pentagon circle 4 2 3 4 1 5 ? ∞

3. REFLECTION Reflects a shape across a line of reflection creating a mirror image REFLECTION 1 ) Line of Reflection regular culprits y axis or x = 0 x axis or y = 0 y = 2 x = -3 y = x y = -x

4. X y 1 2 3 4 5 -1 -2 -3 -4 -5 1 2 3 4 5 y = 2 -1 -2 -4 -5 -3 y = -4 x = 1 x = -3 y = x y = - x

5. Reflection y x 2 4 6 4 -2 -4 -6 6 -4 2 -6 -2 S S ’ 3 3 5 5 4 4 Reflect shape S in the line y=0. Reflect shape T in the line x=1. T T’

6. Reflection y x 2 4 6 4 -2 -4 -6 6 -4 2 -6 -2 Now reflect shape T in the line y = x… T T ’’ 3.5 2 4 4 2 3.5

7. X y 1 2 3 4 5 -1 -2 -3 -4 -5 1 2 3 4 5 -1 -2 -4 -5 -3 Describe the transformation x = 2 Reflection in the line x = 2

8. X y 1 2 3 4 5 -1 -2 -3 -4 -5 1 2 3 4 5 -1 -2 -4 -5 -3 Describe the transformation y = 1 Reflection in the line y = 1

9. PLENARY REFLECTIONS Are the reflections below correct, if not what errors have been made and how would you correct them?

10. STARTER REFLECTIONS Are the reflections below correct, if not what errors have been made and how would you correct them?

11. ROTATIONS Turns a shape about a fixed point ROTATION Three things you need to know 1) Direction Clockwise Anti-clockwise 2) Angle 90° Quarter turn 180° Half turn 270° Three-quarters turn 360° Full turn 3) Centre of rotation The point where you rotate from.

12. Rotate the shape 90˚ clockwise about point A. Rotation A

13. Rotate the shape 90˚ anti-clockwise about point A . Rotation A

14. Rotate the shape 90˚ clockwise about the origin. Rotation

15. Rotate the shape 90˚ anti-clockwise about the origin. Rotation

16. Describe the transformation that maps shape A onto Shape B. Rotation A B Rotation 180 About the origin

17. Rotation A B Describe the transformationthat maps shape A onto Shape B. Rotation 90 clockwise about ?

18. Rotation A B Describe the transformation that maps shape A onto Shape B. Rotation 90 clockwise about (-1, -2)

19. We say that a square has rotational symmetry of order 4 ROTATIONAL ORDER OF SYMMETRY ORDER OF ROTATIONAL SYMMETRY Number of different positions the shape looks the same when it is rotated through a full turn (360°).

20. We say that a heart has rotational symmetry of order 1 ROTATIONAL ORDER OF SYMMETRY

21. What is the order of rotational symmetry? We say that a rectangle has rotational symmetry of order 2

22. ROTATIONAL ORDER OF SYMMETRY (a) (b) (c) Find the order of rotational symmetry for each of the shapes below: 1 2 3 1 2 1 (c) (d) (e) 1 2 3 4 5 6 1 2 3 4 1 2 3 4 5 ORDER 3 ORDER 2 ORDER 1 ORDER 6 ORDER 4 ORDER 5

23. ROTATIONAL ORDER OF SYMMETRY State the order of rotational symmetry for each shape below: Order 6 Order 2 Order 3 Order 2 Order 1 Order 3 Order 2 Order 5 Order 4 Order 1 Order 6 Order 8 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 12)