1. Build a Crystal The Rhombic Dodecahedron
NCTM,
Al Mendle

2. A rhombic dodecahedron
is a polyhedron
with twelve
congruent
rhombic faces.
Each face is proportional to the dimensions shown
in the diagram.

3. One way to visualize how a rhombic dodecahedron is formed is to:
make a 3-dimensional “cross” with seven cubes.
Connect the centers of outside cubes
Another way to generate a rhombic dodecahedron is to:
attach a square based pyramid to each face of a cube. The height of the pyramid should be the length of the edge of the cube.

4. Could bees be geometers?
The hexagonal cells of a honeycomb are when looked at in 3-dimensions are filling space in way way that is very close to a tiling of rhombic dodecahedra.

5. Some Useful Websites http://www.answers.com/topic/rhombic-dodecahedron