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i6 8I Centered polygonal numbers - The Times Hub

Centered polygonal numbers

Centered polygonal numbers

Image from the television series' Green Arrow'.

Sports commentators often call it "the spherical", but the soccer ball is not a perfect sphere, but an inflatable polyhedron that, once filled with air, is quite close to the sphericity. In its most common version, it is a polyhedron made up of pentagons and regular hexagons. How many are there? We wondered last week ….

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