In the relationship between phi, and 5 (they even sound alike!), we take a 5-pointed star -- the points of which form an inscribed five-sized, regular pentagon.  By an arbitrary choice of measurement units, the length of a line drawn from one point of the star to an opposite point, can be set equal to phi.  This results in the line between two adjacent points (one side of the pentagon) automatically equaling phi square 2.
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