Golden

The golden ratio and it’s occurrences in nature, math, geometry and art is interesting stuff. As far as math goes, the Fibonacci sequence and the golden ratio are so easy to wrap your head around:

In mathematics and the arts, two quantities are in the golden ratio if the ratio between the sum of those quantities and the larger one is the same as the ratio between the larger one and the smaller. The golden ratio is approximately 1.6180339887.
A distinctive feature of this shape is that when a square section is removed, the remainder is another golden rectangle, that is, with the same proportions as the first. Square removal can be repeated infinitely, which leads to an approximation of the golden spiral.

It’s said that aesthetically people prefer shapes that employ the golden ratio for proportion. I’ve never tried using this number in design, but last week I came across the Phiculator, it’s a simple flash application that does the math for you. You enter in a dimension and it will calculate the corresponding dimension based on the golden ratio. I know it’s not hard math to do (divide your larger side by 1.618), but the calculator makes it funner.