Not all groups of eubacteria have peptidoglycan, so all eubacteria may be classified as either Gram-positive (able to bind Gram's stain) or Gram-negative (unable to bind Gram's stain).
A portable DVD player is in the shape of a rectangular prism. A soccer ball is in the shape of a truncated icosahedron. These shapes are all examples of polyhedra. A three-dimensional shape whose faces are polygons is known as a polyhedron. This term comes from the Greek words poly, which means many, and hedron, which means face.. So, quite literally, a polyhedron is a three-dimensional object with many faces.
Vocabulary and More Drawing! A polyhedron is a geometric solid made up of polygon faces which meet. at straight-line edges that come together at vertices. Like polygons, polyheda are named with prefixes we have already used. Octahedron = 8 sides. Hexahedron = 6 sides.