Set Theory/Examples/Intersection of Unions/3 Circles in Complex Plane

Example in Set Theory
Let $A$, $B$ and $C$ be sets defined by circles embedded in the complex plane as follows:

$\paren {A \cup B} \cap \paren {B \cup C}$ can be illustrated graphically as:


 * Set-Intersection-of-Unions-3-Circles-in-Complex-Plane.png

where the intersection of the unions is depicted in yellow.