A heptahedron is a polyhedron having seven sides, or faces.

How many edges and vertices does a heptahedron have?

The heptahedron consists of six vertices with (x, y, z) coordinates A(1,0,0), B(0,1,0), C(0,0,1), D(-1,0,0), E(0,-1,0), F(0,0,-1), twelve edges AB, BD, DE, EA, AC, BC, DC, EC, AF, BF, DF, EF and seven faces ABC, CDE, AEF, BDF, BCEF, ACDF, ABDE as shown in Figure I.

Is there a 7 sided 3d shape?

A heptahedron is a polyhedron with seven faces.