Three.
A cube has eight (8) vertices (corners).
Heptahedra can have between 6 and 10 vertices.
8
courners, intersects
An octagon has 8 sides.
A pyramid does.
An octagon has 8 edges
An octagon has 8 vertices.
there are three rhombuses in an octagon.
An octagon has eight sides.
An Octagon has 8 sides