The side of a cone is - not surprisingly - conical is shape. Its net is a sector of a circle.
The curved surface (or face) of the cone.
Triangle
Tilt of cutting plane is between (perpendicular to axis of the cone) and (parallel to the side of the cone).
A cone has one side. (The bottom) Because the other surface is curved, it does not count as a side. It is the same concept as a sphere.
the cone has three sides
Circle: If the knife is perpendicular to the axis of the cone.Ellipse: If the knife is between (perpendicular to the axis of the cone) and (parallel to the side of the cone).Parabola: If the knife is between (parallel to the side of the cone) and (parallel to the axis of the cone).Hyperbola: If the knife is parallel to the axis of the cone.Triangle: If the knife is perpendicular to the base of the cone.Point: If the knife is parallel to the base the cone and through the apex
The side of a cone is - not surprisingly - conical is shape. Its net is a sector of a circle.
parasite or secondary cone
The curved surface (or face) of the cone.
If these forms are all solid, a sphere has one side and face, a cone two, and a cylinder three. If there are hollow, they have one more face than side.
Triangle
Tilt of cutting plane is between (perpendicular to axis of the cone) and (parallel to the side of the cone).
A cone has one side. (The bottom) Because the other surface is curved, it does not count as a side. It is the same concept as a sphere.
A volcanic cinder cone.
triangle
a circle