It has 8.
8
5
An octagon has 8 sides.
An octagon has 8 vertices.
An octagon has 8 edges
An octagon has 8 vertices.
An octagon has eight sides.
there are three rhombuses in an octagon.
An Octagon has 8 sides
An octagon has 8 angles.An octagon has 8 angles.An octagon has 8 angles.An octagon has 8 angles.
The plural noun "verities" means truths.The word sought may be the plural varieties (types, kinds).
a regular octagon has eight sides