like It does exist box, cylinder, half sphere, roof etc... etc... there is a cone in the tinkercad panel basic shapes,
QUESTION : how to create in tinkercad panel a basic shape for a cone frustum (that is a cone with cuted head) but like any other shape in that case we should be able to edit 3 dimensions,
r1 the base radius. h. the height and r2 the top radius
of course could be as well to edit
d1 the base diameter. h. the height and d2 the top diameter