eg1. a square we say that a square has… it fits on itself 4 times back
TRANSCRIPT
Eg1. A square
We say that a square has…
It fits on itself 4 times back
Eg2. A heart shape
We say that a heart has…
It fits on itself only once back
Remember your MARGIN !!!
DATE
Objectives: To be able to recognise
the order of rotational
symmetry of any shape
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…
What is the order of rotational symmetry?
answer
What is the order of rotational symmetry?
answer
What is the order of rotational symmetry?
answer
What is the order of rotational symmetry?
answer
4
3
2
1
-4
-3
-2
-1
-4 -3 -2 -1 0 1 2 3 4 0
A