Section outline

    • Solutions to Ex. 13.1
      Q1. Identify the nets which can be used to make cubes :

      Ans: Figures (ii), (iii), (iv), (vi) can form cubes.

      Q2. Insert suitable numbers in the blanks, remembering that the number on the opposite faces should total to 7.

      Ans:

      Q3. Can this be a net for a die? Explain your answer.

      Ans:

      No, this net is not possible for the die. Because one of the opposite faces is 1 & 4 while another is 3 & 6 and their sum is not 7, hence this die is not possible.

      Q4. Here is an incomplete net for making a cube. Complete it in at least two different ways.

      Ans:

      Q5. Match the nets with appropriate solids:

      Ans: (a) - (ii), (b) - (iii), (c) - (iv), (d) - (i)

       

    • Solutions of Ex 13.2
      Q1. Use isometric dot paper and make an isometric sketch for each one of the given shapes:

      Ans:

      (i)

      (ii)

      (iii)

      (iv)

      Q2. The dimensions of a cuboid are 5 cm, 3 cm and 2 cm. Draw three different isometric sketches of this cuboid.

      Ans:

      Q3. Three cubes each with 2 cm edge are placed side by side to form a cuboid. Sketch an oblique or isometric sketch of this cuboid.

      Ans:

      Q4. Make an oblique sketch for each one of the given isometric shapes:

      Ans:

      (i)

      (ii)