Golden ratio

• Two quantities are in the golden ratio if their ratio is the same as the ratio of their sum to the larger of the two quantities.
• The Greek symbol phi represent the golden ratio.
• The value of golden ratio is 1.6180339887498948420 …
• The golden ratio is also called golden mean or golden section, extreme and mean ratio, medial section, divine proportion, divine section, golden proportion, golden cut, and golden number.

Examples