# Argand diagram

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## Argand diagram

[′är‚gän ′di·ə‚gram]
(mathematics)
A two-dimensional cartesian coordinate system for representing the complex numbers, the number x + iy being represented by the point whose coordinates are x and y.
References in periodicals archive ?
One of the interpretations of i, ([square root of -1]), is a rotation of 90[degrees] counter clockwise (CCW) about the origin of the Argand diagram.
This rotation of 90[degrees] counter clockwise about the origin of a complex number comprising of a real and imaginary part occurs no matter where on the Argand diagram the complex number is, i.
Moreover, the "unceremonious" use here of the Argand diagram may well pave the way, in future, to a more informal approach to the mystery and mysticism of "imaginary" and/or complex numbers.
a) Plot the points 5 + 2i, -5 - 2i on the Argand diagram.
Plot the points 3 + 2i, 3 - 2i on the Argand diagram.

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