Soccer balls are usually covered with a design based on regular pentagons and hexagons.
How many pentagons/hexagons MUST there be, and why?
Although it is true that there is no hexagon and pentagon Johnson solid, this doesn't rule out the possibility of a non-convex shape.
Not that it would make a very good soccer ball.
-Jer
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Posted by Jer
on 2004-04-15 12:03:24 |