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, ...

The faces of a prism are the congruent polygon ‘ends’, plus the rectangles that join them. The number of rectangular faces is equal to the number of sides of the polygon cross-section.

When the cross-section is a triangle, the prism is called a triangular prism. ... The area of the two side rectangular faces is 2 × 10 × 5 = 100 mm².