[b]Key Questions: [/b][br][br]In the surface equations below, what part of the [b][color=#ff00ff]equation of the cone[/color][/b] [i]guarantees [/i]it meets the top circle perfectly? What part of the [b][color=#1e84cc]equation of the funnel [/color][/b]to we need to consider when authoring the equation of the cone? [br][br]What causes there to be four openings at the top? [br][br]What other kind(s) of 3D art can we create in GeoGebra Augmented Reality?