Complex numbers are an extension to the number space providing solutions for square roots of negative numbers.

The basic constant of complex numbers is '''i''' which is defined as solution of sqrt(-1).

If real numbers are thought as a line of infinite length, then the '''imaginary numbers''' (multiples of '''i''') are on a line by the location of 0 on real numbers' line, rotated by pi/4 (or 90 degrees). Both lines define a '''plane''' of complex numbers.



----
[[[Category Mathematics]]]