Concept:In a cube, opposite faces never appear together, and the four faces around a common face form a cycle.Explanation:From the two positions, θ is the common face.In the first position, δ and α are adjacent to θ.In the second position, β and γ are adjacent to θ.Thus, the four faces around θ are δ,α,β,γ in cyclic order.In this cycle, δ and β are separated by one face, so they are opposite each other.
