why no. of edges taken as 3/2n Share with your friends Share 0 Aditi Jain. answered this Dear Student,Let the number of vertices be n,Given: Number of faces=23Number of vertices⇒ Number of faces=23nAlso, in a prism Number of verticesNumber of edges = 23As, number of verticesnumber of edges=23⇒nnumber of edges=23⇒Number of edges=3n2Regards 0 View Full Answer