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The phi ratio, also known as the divine proportion, golden mean, or golden section, is a number often encountered when taking the ratios of distances in simple geometric figures such as the pentagon, pentagram, decagon and dodecahedron.The phi ratio (symbol is the Greek letter "phi" ) is a special number approximately equal to 1.618. The number phi, often known as the golden ratio, is a mathematical concept that people have known about since the time of the ancient Greeks.Over the centuries, the …