An Argand diagram is a plot of complex numbers as points z = x + i y in the complex plane using the x-axis as the real axis and y-axis as the imaginary axis. In the plot above, the dashed circle represents the complex modulus left bracketing bar z right bracketing bar of z and the angle θ represents its complex argument.

complex argument | complex modulus | complex number | complex plane | imaginary number | phasor | real line | real number