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Qualification => Subject Doubts => IGCSE/ GCSE => Math => Topic started by: rainbowtiara24 on May 08, 2011, 06:04:31 am

Title: Rotational symmetry help !
Post by: rainbowtiara24 on May 08, 2011, 06:04:31 am
Hey !
i almost always get confused when questions related to rotational symmetry are asked ....could anybody explain the concept clearly ?
Title: Re: Rotational symmetry help !
Post by: SauD~ on May 08, 2011, 04:04:55 pm
Rotating of object.... but the rotation should be similar to the last rotation..
Like a rectangle.... its has 2 rotational symmetry
square has 4 because its remains similar...

Well i am ain't a good explainer so i think i will get you somebody to help ya :)
Title: Re: Rotational symmetry help !
Post by: NotAbod on May 08, 2011, 04:11:20 pm
Quote from: rainbowtiara24 on May 08, 2011, 06:04:31 am
Hey !
i almost always get confused when questions related to rotational symmetry are asked ....could anybody explain the concept clearly ?
using a tracing paper would help!
draw the shape on a tracing paper
place the tracing paper on the original shape, and start rotating it
and count how many times the shape is exactly the same.
2 for rectangle, the shape will be exactly the same 2 times, 1 after rotating it by 180degrees and one by 360degrees.
hope i helped
Title: Re: Rotational symmetry help !
Post by: rainbowtiara24 on May 08, 2011, 05:19:32 pm
you definitely did :)
thank you !!!1111
Title: Re: Rotational symmetry help !
Post by: NotAbod on May 08, 2011, 05:27:17 pm
Quote from: rainbowtiara24 on May 08, 2011, 05:19:32 pm
you definitely did :)
thank you !!!1111
you're most welcome!
dont forget to take tracing paper with u 2mrw, it will help u!
Title: Re: Rotational symmetry help !
Post by: Deadly_king on May 08, 2011, 07:17:13 pm
Quote from: AboD on May 08, 2011, 04:11:20 pm
using a tracing paper would help!
draw the shape on a tracing paper
place the tracing paper on the original shape, and start rotating it
and count how many times the shape is exactly the same.
2 for rectangle, the shape will be exactly the same 2 times, 1 after rotating it by 180degrees and one by 360degrees.
hope i helped

Very good explanation :D

Here is a link with the same explanation :P

http://www.mathsisfun.com/geometry/symmetry-rotational.html
Title: Re: Rotational symmetry help !
Post by: NotAbod on May 08, 2011, 07:19:22 pm
Quote from: Deadly_king on May 08, 2011, 07:17:13 pm
Very good explanation :D

Here is a link with the same explanation :P

http://www.mathsisfun.com/geometry/symmetry-rotational.html
lol :P
Thanks :P