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 Post subject: Rotational symmetry
PostPosted: Sun Aug 30, 2009 2:01 pm 

Joined: Mon Jun 18, 2007 2:32 pm
Posts: 6940
Location: East Kent
when I learned rotational symmetry it was as an order of rotational symmetry , how many turns before the shape superimposed on itself.

I have to admit I am a bit stumped by the exact definition of " a shape with rotational symmetry"

How would you define it? surely every shape has rotational symmetry if it turns the full 360 degrees?

yours embarrasingly clueless
of Kent

 Post subject:
PostPosted: Sun Aug 30, 2009 8:20 pm 

Joined: Thu Mar 05, 2009 9:26 am
Posts: 284

My DS came across this question yesterday and we were a bit stumped too! I looked it up and found out that Rotational Symmetry is where you can turn a shape or picture and it still looks the same (turning it 360 doesn't count though).

Hope this helps

 Post subject:
PostPosted: Mon Aug 31, 2009 1:44 pm 

Joined: Tue Oct 28, 2008 6:41 pm
Posts: 133
Location: Surrey

On the CGP books, it states that rotational symmetry is how many times a shape can be turned until it fits into itself (or something like that). It also says that a shape that only fits onto itself once can be "Rotational Symmetry Order 1" OR "No rotational symmetry".

Could go both ways on this one (according to CGP)!



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