A ratio that is seen many times in geometry, architecture and art is the "golden ratio", which equals approximately 1.618.
We can find the golden ration by dividing a line into two parts such that the longer part, which we can label "a" divided by the smaller part, labeled "b" is also equal to the entire length of the line "a + b" divided by the longer part "a".
a/b + (a + b)/a
It is said that the most appealing rectangle to the eye is in the golden ratio.
One such rectangle is one with length 10 and width 6.18.
a = 10
b = 6.18
10/6.18 = 16.18/10 which is approximately 1.618