Eg1. A square - PowerPoint PPT Presentation

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Eg1. A square

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Eg1. A square It fits on itself 4 times back We say that a square has Rotational Symmetry The order of rotational symmetry of a shape is determined by how many ... – PowerPoint PPT presentation

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Title: Eg1. A square


1
Eg1. A square
It fits on itself 4 times
back
We say that a square has
2
Eg2. A heart shape
It fits on itself only once
back
We say that a heart has
3
(No Transcript)
4
Rotational Symmetry
  • The order of rotational symmetry of a shape is
    determined by how many times the shape fits onto
    itself during a 360 turn. (Example 1)
  • Every shape has an order of rotational symmetry,
    even if it is order 1. (Example 2)
  • Have a look at the following shapes

5
What is the order of rotational symmetry?
answer
6
What is the order of rotational symmetry?
answer
7
What is the order of rotational symmetry?
answer
8
What is the order of rotational symmetry?
answer
9
4
3
2
A
1
0
-4 -3 -2
-1 0 1 2 3
4
-1
-2
-3
-4
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