3D shapes

It would be called 'pentahedral` penta- for five and -hedral for sides but I'm curious about the object. For instance a quadrilateral (four sided base) pyramid is also a pentahedral object (but a pentahedral isn't necessarily a quadrilateral pyramid.

Rap

Rethinking my presumption.

I can't think of a pentahedral that is not quadrilateral pyramid---- but that is not proof.

Does anyone know if all pentahedrals are quadrilateral pyramids?

Rap

A triangular prism has five sides, but is not a pyramid.

markr

thanks---sometimes it's a wonder my forehead isn't sloped.

Rap