Neither. A cone is a cone.
triangle and circle
circle and a curved surface
A sphere to a cone is the same as a circle is to a triangle but they are both 3 dimensional.
In a right circular cone the base is a circle and the sloped side is a sector of a circle. For a general cone, they are an ellipse and a sector of an ellipse.
cone
its a a combination of a 3D circle and triangle
A cone.
Cone shaped
The shape of ice cream is usually a circle or a sphere, or a random wanky shape.
Looking from the base your would see a circle. Looking from the side you would see a triangle.
a cone . . . . I imagined Metaknight but that's up to you.
A Cone
A right circular cone could probably do that.
A cone has a circle for a base and a triangular prism has a triangle for a base
A cone
To make a teepee with paper, start by cutting out a large circle for the base and then cut out a triangle shape from a piece of paper, ensuring the height is at least twice the radius of the base circle. Roll the triangle into a cone shape and secure it with tape or glue. Cut a small slit in the base of the cone and attach it to the center of the circle by folding the edges of the circle up around the cone. You can decorate the teepee with markers or colored paper for added detail.
The base of a cone is always a circle. it also can be a ellipse.