Rotational symmetry

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yoyo123
Posts: 8099
Joined: Mon Jun 18, 2007 3:32 pm
Location: East Kent

Rotational symmetry

Post by yoyo123 »

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?

:oops:
yours embarrasingly clueless
of Kent
Plum
Posts: 284
Joined: Thu Mar 05, 2009 10:26 am

Post by Plum »

Hi

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
Plum
LuluQueen
Posts: 133
Joined: Tue Oct 28, 2008 7:41 pm
Location: Surrey

Post by LuluQueen »

Hi,

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)!

LQ
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