A 3D shape with all straight edges and flat faces is a polyhedron. Other 3D shapes with least one curved surface are not polyhedra. A 3D shape with regular polygonal faces, meeting at equal angles, is ...

A pyramid is made up of a polygonal base face and triangular faces that meet at a point called the apex. A pyramid is named by the shape of its ‘base’. A pyramid with a triangular base is a ...

Object Details maker Berman, Martin Description The model has three squares faces around a triangular base. Three equilateral triangles rise from the other end to meet at a vertex. Hence the total ...