Octahedron

An octahedron is a regular polyhedron formed by $$8$$ equal equilateral triangles. It is possible to look at it as the union of the equilateral triangles or of two equal regular quadrangular pyramids.

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If we develop the octahedron, we obtain the following figure:

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The properties of the octahedron are:

  • Number of faces: $$8$$
  • Number of vertexes: $$6$$
  • Number of edges: $$12$$
  • Number of edges meeting in each vertexes: $$4$$