Soma de números complexos

Synopsis: the complex number z is the result of the sum of u and v complex. When represented in the Argand-Gauss plane, the sum of two complex numbers is the sum of two vectors by the parallelogram rule.
Hold and drag the affixes of complex numbers u and v observe getting results try algebraic as geometrically.
Source: GeoGebra - Fabio Marson Ferreira.
URL: http://tube.geogebra.org/student/m34053