Maths Gcse Aqa Foundation
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Rotational-Symmetry Aqa Foundation
Exam code:8300
Rotational symmetry
What is the order of rotational symmetry?
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Rotational symmetry refers to the number of times a shape looks the same as it is rotated 360° about its centre
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This number is called the order of rotational symmetry
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Tracing paper can help work out the order of rotational symmetry
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Draw an arrow on the tracing paper so you can easily tell when you have turned it through 360°
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Notice that returning to the original shape contributes 1 to the order
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This means a shape can never have order 0
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A shape with rotational symmetry order 1 may be described as not having any rotational symmetry
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The only time it looks the same is when you get back to the start
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Examiner Tips and Tricks
Remember to use the trick above; using an upwards arrow on the tracing paper to show the starting orientation of the shape.
Worked Example
For the shape below, shade exactly 4 more squares so that the shape has rotational symmetry of order 4.
The shape below appears the same 4 times if rotated through 360 degrees
Responses