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Qualification => Subject Doubts => IGCSE/ GCSE => Math => Topic started by: NotAbod on May 08, 2011, 07:02:29 pm

Title: Rotational symmetry about centre by 360 degrees
Post by: NotAbod on May 08, 2011, 07:02:29 pm
 A shape like kite has no rotational symmetry, am i right?
but if u rotate the kite 360 degress about its centre, it will return to its orginal postion
so, for shapes like kites, rotational symmetry is 0 or 1?
Title: Re: Rotational symmetry about centre by 360 degrees
Post by: Deadly_king on May 08, 2011, 07:12:51 pm
A shape like kite has no rotational symmetry, am i right?
but if u rotate the kite 360 degress about its centre, it will return to its orginal postion
so, for shapes like kites, rotational symmetry is 0 or 1?

It should be 1 for kites ;)

Check this (http://www.mathsisfun.com/geometry/symmetry-rotational.html).

Hope it helps :)
Title: Re: Rotational symmetry about centre by 360 degrees
Post by: NotAbod on May 08, 2011, 07:14:39 pm
It should be 1 for kites ;)

Check this (http://www.mathsisfun.com/geometry/symmetry-rotational.html).

Hope it helps :)
but in that site its written
Quote
Is there Rotational Symmetry of Order 1 ?

Not really! If a shape only matches itself once as you go around (ie it matches itself after one full rotation) there is really no symmetry at all, because the word "Symmetry" comes from syn- together and metron measure, and there can't be "together" if there is just one thing.)
so is it 1 or 0?
Title: Re: Rotational symmetry about centre by 360 degrees
Post by: Deadly_king on May 08, 2011, 07:21:13 pm
but in that site its writtenso is it 1 or 0?

Well observed ;)

So it's gonna be 0 then :D
Title: Re: Rotational symmetry about centre by 360 degrees
Post by: NotAbod on May 08, 2011, 07:22:08 pm
Well observed ;)

So it's gonna be 0 then :D
Ok ;D
Thanks
Title: Re: Rotational symmetry about centre by 360 degrees
Post by: Deadly_king on May 08, 2011, 07:29:36 pm
Ok ;D
Thanks

Anytime dude :D
Title: Re: Rotational symmetry about centre by 360 degrees
Post by: rainbowtiara24 on May 09, 2011, 04:12:32 am
CIEwould prefer either (1 0r 0) :)