Skip to main content
complex plane

complex plane

1 7.1
A flat surface for showing numbers that have a real part and an imaginary part as points
  • noun
  • /ˈkɒmplɛks pleɪn/
  • Specialized
translation icon : plano complejo
  • Mathematicians often use the complex plane to illustrate the relationship between real and imaginary numbers.

Yeah, If you go to the complex plane, yes.

Examples

  • When graphing, each complex number is plotted on the complex plane to visualize its real and imaginary components.

  • A phase represents on the complex plane a point on the unit circle.

  • Some really beautiful mathematics appears when you consider transformations of the complex plane in this way.

    Blog text (9)
  • Every complex number can be represented as a point on the complex plane, where the horizontal axis shows real parts and the vertical axis shows imaginary parts.

Synonyms

Argand diagram
vscomplex plane
  • Specialized
8.9

A flat picture that shows numbers with a real and an imaginary part as points on two axes

is the flat plane for plotting those points with real and imaginary axes

Surface Forms

complex plane singular

Morphology

complex + plane

Although 'plane' (a flat two-dimensional surface) is transparent, the adjective 'complex' here has a specialized mathematical sense ('relating to complex numbers') rather than the common sense 'complicated', so a B1 learner who only knows ordinary word meanings will likely not infer the correct meaning. This is a technical, subject-specific term whose correct interpretation depends on domain knowledge rather than straightforward composition of the common senses.

Etymology

Complex plane comes from a simple picture: a flat plane like a piece of paper where each complex number has a 'real' part and an 'imaginary' part and is shown as a point with a horizontal and a vertical position. So the complex plane means the flat graph where the 'real' values go along the horizontal line and the 'imaginary' values go along the vertical line.