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Roational Symmetrey © 2007 All rights reserved 5 7 2 1.

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Presentation on theme: "Roational Symmetrey © 2007 All rights reserved 5 7 2 1."— Presentation transcript:

1 Roational Symmetrey © 2007 All rights reserved 5 7 2 1

2 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.

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. Order 1

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

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 2 1 Order 3

6 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

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

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

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

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

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

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

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

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

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

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

17 Rectangle A rectangle has rotational symmetry of order ? Rectangle

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

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

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

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

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

23 Kite A kite has rotational symmetry of order ? Kite

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

25 Rhombus A rhombus has rotational symmetry of order ? Rhombus

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

27 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

28 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


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