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Rotational Symmetry All 2 dimensional shapes have some rotational symmetry. The degree of rotational symmetry that an object has is known as its order.

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Presentation on theme: "Rotational Symmetry All 2 dimensional shapes have some rotational symmetry. The degree of rotational symmetry that an object has is known as its order."— Presentation transcript:

1 Rotational Symmetry All 2 dimensional shapes have some rotational symmetry. The degree of rotational symmetry that an object has is known as its order. For shapes that have “order 2” rotational symmetry or higher, a single centre of rotation can be located. For shapes that have only “order 1” rotational symmetry a centre of rotation can be found anywhere within it. PowerPoint XP or above is needed to view the rotations on this presentation. Order 1 Order 2 Order 3 Order 4 The order of rotational symmetry that an object has is the number of times that it fits on to itself during a full rotation of 360 degrees.

2 Rotational Symmetry The order of rotational symmetry that an object has is the number of times that it fits on to itself during a full rotation of 360 degrees. Order 1

3 Rotational Symmetry The order of rotational symmetry that an object has is the number of times that it fits on to itself during a full rotation of 360 degrees. 2 1 Order 1 Order 2

4 Rotational Symmetry The order of rotational symmetry that an object has is the number of times that it fits on to itself during a full rotation of 360 degrees. 2 1 Order 1 Order 2 3 2 1 Order 3

5 Rotational Symmetry The order of rotational symmetry that an object has is the number of times that it fits on to itself during a full rotation of 360 degrees. 2 1 Order 1 Order 2 3 3 4 2 1 2 1 Order 4 Order 3

6 Rotational Symmetry What is the order of rotational symmetry of the shape below?

7 Rotational Symmetry What is the order of rotational symmetry of the shape below? 5 4 1 3 2 Order 5

8 Rotational Symmetry What is the order of rotational symmetry of the shape below?

9 Rotational Symmetry What is the order of rotational symmetry of the shape below? 6 5 1 2 4 3 Order 6

10 Regular Polygons Equilateral Triangle
An equilateral triangle has rotational symmetry of order ? Regular Polygons

11 Equilateral Triangle An equilateral triangle has rotational symmetry of order ?

12 Equilateral Triangle An equilateral triangle has rotational symmetry of order ? 3 3 2 1

13 Square A square has rotational symmetry of order ? Square

14 Square A square has rotational symmetry of order ?

15 Square A square has rotational symmetry of order ? 4 3 4 2 1

16 Pentagon Regular Pentagon
A regular pentagon has rotational symmetry of order ? Pentagon

17 Regular Pentagon A regular pentagon has rotational symmetry of order ?

18 Regular Pentagon A regular pentagon has rotational symmetry of order ? 5 5 4 1 3 2

19 Hexagon Regular Hexagon
A regular hexagon has rotational symmetry of order ? Hexagon

20 Regular Hexagon A regular hexagon has rotational symmetry of order ?

21 Regular Hexagon 6 A regular hexagon has rotational symmetry of order ?
5 6 4 1 3 2

22 Octagon Regular Octagon
A regular octagon has rotational symmetry of order ? Octagon

23 Regular Octagon 8 A regular octagon has rotational symmetry of order ?
7 8 6 1 5 2 4 3

24 Rectangle A rectangle has rotational symmetry of order ? Rectangle

25 Rectangle A rectangle has rotational symmetry of order ? 2 2 1

26 Parallelogram Parallelogram
A parallelogram has rotational symmetry of order ? Parallelogram

27 Parallelogram 2 A parallelogram has rotational symmetry of order ? 2 1

28 Isos Tri Isosceles Triangle
An isosceles triangle has rotational symmetry of order ? Isos Tri

29 Isos Tri Isosceles Triangle 1
An isosceles triangle has rotational symmetry of order ? 1 Isos Tri

30 Scalene Tri Scalene Triangle
An scalene triangle has rotational symmetry of order ? Scalene Tri

31 Scalene Triangle 1 An scalene triangle has rotational symmetry of order ? 1

32 Isos Trapezium Isosceles Trapezium
An isosceles trapezium has rotational symmetry of order ? Isos Trapezium

33 Isosceles Trapezium An isosceles trapezium has rotational symmetry of order ? 1 1

34 Trapezium A trapezium has rotational symmetry of order ? Trapezium

35 Trapezium 1 A trapezium has rotational symmetry of order ? 1

36 Kite A kite has rotational symmetry of order ? Kite

37 Kite 1 A kite has rotational symmetry of order ? 1

38 Rhombus A rhombus has rotational symmetry of order ? Rhombus

39 Rhombus 2 A rhombus has rotational symmetry of order ? 2 1

40 Ellipse An ellipse has rotational symmetry of order ? Ellipse

41 Ellipse 2 An ellipse has rotational symmetry of order ? 1 2 Ellipse

42 Questions 1 Rotational Symmetry
State the order of rotational symmetry for each shape below: 1 2 3 4 Order 6 Order 2 Order 3 Order 2 5 6 7 8 Order 1 Order 3 Order 2 Order 5 9 10 11 12 Questions 1 Order 4 Order 1 Order 6 Order 8

43 Worksheet 1 Rotational Symmetry
State the order of rotational symmetry for each shape below: 1 2 3 4 5 6 7 8 9 10 11 12 Worksheet 1

44 Questions 2 Rotational Symmetry
State the order of rotational symmetry for each shape below: 13 14 15 16 Order 4 Order 1 Order 2 Order 5 17 18 19 20 Order 2 Order 4 Order 6 Order 3 21 22 23 24 Questions 2 Order 5 Order 4 Order 3 Order 1

45 Worksheet 2 Rotational Symmetry
State the order of rotational symmetry for each shape below: 13 14 15 16 17 18 19 20 21 22 23 24 Worksheet 2


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