Corollary: Cor. 12.17: Construction of Polyhedron in Outer of Concentric Spheres

(Corollary to Proposition 17 from Book 12 of Euclid's “Elements”)

And, also, if a similar polyhedral solid to that in sphere $BCDE$ is inscribed in another sphere then the polyhedral solid in sphere $BCDE$ has to the polyhedral solid in the other sphere the cubed ratio that the diameter of sphere $BCDE$ has to the diameter of the other sphere.