only a 3D figure has a face so no
Sometimes. Any face can be defined as a base of a prism; but pyramids may have one face that is a base and not a triangle.
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!
length times width i think* * * * *There are different formulae for calculating the surface areas of different 3D figures. If the 3D figure is a polyhedron, then each face is a ploygon and you can use the various formulae to calculate the area of each face and then add them together.There are straightforward equations for ellipsoids, and members of the conic family but other 3D shapes have more complicated formulae.
Sometimes because a sphere which is a 3d figure has a diameter
Both represent a shape and are a 3D figure but, a pyramid only has 1 face and prisms have 2 faces.
The cone IS a 3d figure.
It depends on the type of figure. If it is a 2D figure, then it is called area. If it is a 3D figure, then it is called volume.
A circle is not a 3D figure because it only has two dimensions. A sphere is a 3D "circle".
A 3D figure shows length, width and depth. While a 2D figure only shows length and width.
Depends
A solid.