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improve language, toss in a couple more digits
:<math>\frac{1 + \sqrt{5}}{2}</math>
:<math>\frac{1 + \sqrt{5}}{2}</math>
Phi is an [[irrational number]]. In decimal form it is often written
Phi is an [[irrational number]]. Its decimal expansion begins
:1.618...
:1.61803...
The golden ratio was first defined by Euclid of Alexandria around 300BC. His definition reads:
The golden ratio was first defined by Euclid of Alexandria around 300BC. His definition reads: