Set Theory/Examples/Union of Intersections/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:

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


 * Set-Union-of-Intersections-3-Circles-in-Complex-Plane.png‎

where the union of the intersections is depicted in yellow.