What is Cuboid ?
A cuboid has different length, breadth and height
1) The plane region is called a face. A cuboid has 6 rectangular faces
2) Any 2 faces other than opposite faces are called adjacent faces
3) When 2 adjacent faces of a cuboid meet in line, it is called the edge of the cuboid. A cuboid has 12 edges
4) The point of intersection of edges of a cuboid is called a vertex. A cuboid has 8 vertex
So cuboid has :
1) 6 rectangular faces, which are  ABEF, EFHG, ADHE, BCFG, ABCD, DCHG
2) 12 edges in cuboid, which are  AB, BF, FG, GH, HE, HD, DA, AE, GC, DC, AD,AC
3) 8 Vertex in cuboid, which are  A, B, C ,D, E, F, G, H

