The unpainted wooden model is a triangular prism with three rectangular sides and a triangular base and top. It separates into three pyramids of equal volume; two of these are identical. A diagram of ...

It is dissected into three pieces. A paper label attached to one side reads: Triangular Frustum. For Ross solids, see 1985.0112.205 through 2012.0112.217. For further information about Ross models, ...