The Golden Ratio is a mathematical constant approximately equal to 1.618 that is found in art, architecture, and nature. It describes a proportion where a line is divided such that the ratio of the whole line to the longer segment is the same as the ratio of the longer segment to the shorter segment. The Golden Ratio was used by ancient Greeks and Egyptians to achieve beauty and balance in their structures. It also appears in the Fibonacci sequence of numbers and is believed to influence what humans perceive as aesthetically pleasing in faces and bodies.