The magnitude of a complex number is the length when considered as a 2D-Vector in the complex plane or on the Argand Diagram. This is used in the polar representation of a complex number and is computed using Pythagoras' Theorem

• $|~a+bi~|~=~\sqrt{a^2+b^2}$
The square of the magnitude of a complex number is also the product of the number with its complex conjugate.
AbsoluteValue
ComplexNumber
DividingComplexNumbers
Logarithm
MultiplyingComplexNumbers
PythagorasTheorem
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PolarRepresentationOfAComplexNumber (none)

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MagnitudeOfAComplexNumber
ArgandDiagram
ComplexConjugate
ComplexNumber
ComplexPlane
PythagorasTheorem
TranscendentalNumber Euler
RealNumber