The Golden Mean (Ratio)

The golden mean has always been a part of the universe but it's first physical example of it is the Great Pyramids and the Parthenon.

The ratio of the length and width of the Golden rectangle is the Golden Ratio. The exact value of the Golden Mean is 1.6180...  The Golden Ratio is also equal to a/b=(a+b)/a. The Golden Mean is represented within the Fibonacci Sequence. The Fibonacci Sequence is when each term is the sum of the previous two terms. An example of this would be: 0, 1, 1, 2, 3, 5, 8, 13... It is said that the farther the sequence goes, the closer it gets to the Golden Ratio.  If the width of the rectangle is 2, the length would be 1.62. The Golden Mean is also known as phi. The Great Pyramid of Giza, the ratio isn't exactly 1.6180, but it is close so it is still considered to follow the Golden Mean format.