So many applications, explore your own.
Be creative with applications of Voronoi diagrams. Identify a landmark in a city e.g. hospitals, coffee shops, emergency services and determine the best location for another of those landmarks. Use the city boundaries as your convex hull and model it properly on Desmos or GeoGebra. Extension: Distance to your landmark may be optimised, but what about journey time? Are there other methods to determine the best location, perhaps using statistics or trial and error? Discuss.