A
threedimensional figure
is a figure with width, length, and height. 
A
face is a flat
side of a solid.
An edge is where
2 faces of a solid meet.
A vertex
is where 3 or more faces meet.

Example: A
cube has 6
faces, 12 edges, and
8 vertices.

Example:
A square pyramid has
5 faces, 8
edges, and 5 vertices.

Let's
Practice!
click
here

Remember:
A face
is a flat side of a solid.
An edge is where 2
faces of a solid meet.
A vertex is where 3
or more faces meet.

