Heptagonal pyramid * * * * * No. A heptagonal pyramid has 8 vertices. You need a hexagonal pyramid or a pentagonal dipyramid for 7 vertices. Or, in 2d, a heptagon.
The answer depends on the size of the cube.
There are 7 vertices on a cube
A cube has six sides
A cube has eight points.
a cube has six faces
A cube has 8 vercities.
A cube has 12 edges.
There are 12 edges in a cube.
A cube has six faces.
How big is the cube??
A cube has 6 surfaces.