


Description 



Face: One of the polygons that makes up a polyhedron. 
The figure to the left shows three sides of a cube. The faces of
the cube are the colored squares. The edges are labeled with lowercase
letters and are the line segments where the faces intersect. The vertices
are labeled with capital letters and are point(s) where the edges
intersect.
There are six faces: red, green and blue that you can see
here, and faces in the back, on the left and on the bottom that are not shown.
There are eight vertices: A, B, C, D, E (hidden in lower left rear corner), F,
G, H. There are twelve edges: o, p, q, r, s (hidden in lower rear), t (hidden in
left rear), u, v, w, x (hidden in lower left), y, z.
The red and green faces are adjacent. The segment where the red
and green faces meet is an edge (labeled r). Likewise, the red and blue faces
are adjacent, and the segment where these faces meet is an edge (labeled q).
Also in view, the blue and green faces are adjacent, and the segment where these
faces meet is also an edge (labeled z). Note: the blue face on top and the
colored face on the bottom (which you cannot see here) are not adjacent faces
because they do not share a common edge.
The three line segments q, r, and z meet at a point called a
vertex (labeled C).
To explore this on your own, click here to open a page with a template for a cube. Print out the template
and construct the cube. Finding the faces, edges, and vertices of another solid is analogous to finding them on the cube. To try and build your own model of the Platonic solids, click below to go to a page with a template:
cube
dodecahedron
icosahedron
octahedron
tetrahedron


