Tornado Inside a Cone? Creating Art in GeoGebra Augmented Reality

Key Questions: In the surface equations below, what part of the equation of the cone guarantees it meets the top circle perfectly? What part of the equation of the funnel to we need to consider when authoring the equation of the cone? What causes there to be four openings at the top? What other kind(s) of 3D art can we create in GeoGebra Augmented Reality?