With reference to fig. 12.18:
(i) Name all its edges.
Edges are denoted by the lines in oblique sketch
So,
Name of Edges:
Edge AB ,Edge BC,Edge CD,Edge AD ,Edge BF,Edge EF,Edge AE,Edge GF,Edge GC,Edge GH,Edge HE ,Edge HD
Name the pairs of all possible paralles edges of the pencil box whose figure is shown in Fig
(i) Name all its faces.
(i) Name all the vertices.
With reference to fig 12.17:
(i) Write the name of all the edges. How many edges are there in all?
(i) Name the equal edges.