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This problem offers opportunities to think about the properties of regular shapes and decide which do, and which do not, affect the result.
There is also opportunity for geometric reasoning based on area, but saying any more about that would give away too much about one route through the problem !
Pentagonal
Age 14 to 16
Challenge Level 
This problem offers opportunities to think about the properties of regular shapes and decide which do, and which do not, affect the result.
There is also opportunity for geometric reasoning based on area, but saying any more about that would give away too much about one route through the problem !
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