sqrt(x^2+y^2) code example

Example 1: sqrt(2)^2

sqrt(a)^2 = a

Example 2: sqrt(x) = 2

sqrt(x) = a
x = a^2

Example 3: sqrt(14^2+5^2)

sqrt(14^2+5^2) =~ 14.866

Example 4: 1/2+sqrt(5)/2

Golden Ratio!!