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 ...

Triangular prism. Triangular prisms have 5 flat faces. 2 are triangle shaped and 3 are rectangle shaped. Everyday things that have the shape of a triangular prism include a tent and a slice of cake.