A cone needs a three dimensional space in which to exist but it's not a solid, it's a two dimensional surface.
Same basic shape, except a cone has three dimensions, a triangle has two.
12' To answer this properly more information is needed about the cone. 12' is just one measure, a cone is a 3 dimensional figure.
The dimensions of a Nestlé Drumstick cone can vary slightly by flavor and packaging, but generally, the cone is about 6 to 7 inches tall, with a base diameter of approximately 2 to 3 inches. The ice cream portion typically has a diameter of around 3 to 4 inches at the top. The cone itself is designed to hold a generous scoop of ice cream, topped with chocolate and nuts in many varieties.
A cone has two faces.
A cone does not have any sids. A finite cone has two faces.
14ft inches
Same basic shape, except a cone has three dimensions, a triangle has two.
12' To answer this properly more information is needed about the cone. 12' is just one measure, a cone is a 3 dimensional figure.
There are way too many variations for that to be possible to answer offhand.
These dimensions are not possible for a right cone. The radius must be less than the slant height. If we reverse the dimensions (radius 6, slant height 9) the total surface area will be about 282.74 units2
Two
A cone has no corners.
A cone has two faces.
A cone has one vertex.
A cone does not have any sids. A finite cone has two faces.
There is one face in a cone. It is at the bottom.
a cone has 0 corners