5 Flags to a Side

A building is being prepared for opening. People are decorating the building with 12 flags. At first they arrange the flags 4 to a side, as shown, but then they see that the flags can be arranged 5 to a side using only 12 flags. How?

flags 4 a side


Place 2 flags at every corner and 1 flag in the center.

5 flags to a side

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