Equation of Circle in Complex Plane/Examples/Radius 4, Center (0, 0)

Example of Use of Equation of Circle in Complex Plane
The equation:
 * $z \overline z = 16$

describes a circle embedded in the complex plane whose center is at $\tuple {0, 0}$ and whose radius is $4$.

Proof
The result follows from Equation of Circle in Cartesian Plane.