How do you create a cut on a 3D Rotating Ellipse?
I am trying to create 3D rotated ellipse with a vertical cut, as in the file "Ellipse Image".
In the .ggb file you can see the 3D ellipse and two lines.
I'd like to remove the surface on the ellipse given by the space between the two lines that intersect it.
Could anyone please suggest how this could be done with GeoGebra?