Four Fundamental Characteristics of Phi

There are four fundamental characteristics of how phi is observed: as Spiral, Quantity, Scale and Angles. The following sections provide a brief introduction to each one with a few examples found in nature.

Phi as Spiral and Double Spiral 
Phi as Quantity - Fibonnaci Branching

Phi as Scaling Ratio in Bones of Hand
Phi as Scaling Angle in Spruce Tree
Phi as Rotation Angle in Plant Phyllotaxis



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