A regular octahedron has 6 apexes as it can be rotated evenly as each face is congruent.
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equilateral triangles
An octahedron has 8 sides.
a octahedron has 8 faces
An octahedron has eight faces - by definition.
An octahedron has 8 sides.An octahedron is a polyhedron with eight plane faces.