A pentahedron is: "in geometry, a pentahedron (plural: pentahedra) is a polyhedron with five faces or sides." wikipedia 
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https://en.wikipedia.org/wiki/Pentahedron
Example: Competence Model by Olaf Brugman, using a pentahedron structure.
See also
PentahedronA pentahedron is: "in geometry, a pentahedron (plural: pentahedra) is a polyhedron with five faces or sides." wikipedia .
https://en.wikipedia.org/wiki/Pentahedron
Example: Competence Model by Olaf Brugman, using a pentahedron structure.
See also