sphere
Possibly a face - or an edge. It would help if the question was properly phrased.
a face.
A cylinder !
A cone.
A sphere
A blob.
They both have a face, not a :) face but a side of a shape is called a face and a 2d and 3d shape both show a face of the shape
Mobius strip
An edge.
sphere
To answer this question more details need to be provided. For example one a 3D shape one side is called a face.
A triangle is a 2D object, and faces can only be found on 3D objects.But yes, the bottom line of a triangle is still a side, and the bottom face of a 3D object with a triangular face is still a face.
Possibly a face - or an edge. It would help if the question was properly phrased.
Since a face of a 3d figure is the same as a side, you have two faces sharing a face! The result is lots of coincident faces!
3d horizontal side by side
A place where two faces meet is called an edge.