How do you create a disk from a circle or ellipse?
This is driving me absolutely batty. I've searched high and low and Google has turned up nothing. All I want to do is either create a point on the surface of a cone where a line passes through it, or create a surface from an ellipse so that I can get the points where the ellipse intersects the cone using the surface intersect tool. But neither are apparently possible in Geogebra?
What am I missing?