Pentahedron
/ˌpentəˈhiːdrən/
Definition 1 of 1
Pro Tip 1/3Not Just Pyramids
While a pyramid is a common pentahedron, not all pentahedra are pyramids. Explore other shapes too. 
A triangular prism is also a pentahedron.
Pro Tip 2/33D Shape Context
'Pentahedron' refers specifically to a 3-dimensional shape, not a flat, 2D polygon. 
A drawing of a pentahedron on paper is a 2D representation of a 3D object.
Pro Tip 3/3Faces Joining
A pentahedron's faces must join with others along edges to form a closed 3D shape. 
Each face of a pentahedron shares its edges with adjacent faces.