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 Post subject: Symmetry
PostPosted: Fri Jan 23, 2009 2:43 pm 
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Joined: Sat Sep 27, 2008 8:34 pm
Posts: 85
Location: Coastal village
Does anyone have any suggestions for learning this skill? My 10 year old is good at maths but has a mental block about this ... :? :?


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PostPosted: Fri Jan 23, 2009 4:57 pm 
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Joined: Mon Feb 12, 2007 1:21 pm
Posts: 11936
Practical work - use mirrors on the edge of a pattern.

http://www.mathsnet.net/cruncher/symmetry.swf

It's not perfect because it does not allow a shape that 'straddles' the mirror.

Copy patterns etc

For rotational symmetry - again do lots of examples -

http://www.subtangent.com/maths/flash/ors.swf


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PostPosted: Sat Jan 24, 2009 5:14 pm 
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Joined: Sat Sep 27, 2008 8:34 pm
Posts: 85
Location: Coastal village
That's great, thanks, I'll give it a go and see what happens :D


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