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               \ 26-Sep-2025  Bharat Arora   Proof-10                                   Reader’s Sign _______________________ Date __________


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               Objective: Wrapping and decorating a gift box.

               Materials Required: An empty shoebox or any other cubical/cuboidal box, a sheet

               of gift wrapping paper, some star cutouts, colourful ribbon/paper strips, some
               decorating stones and glue.

               Procedure:

                     Š First, cover the box with a wrapping paper.

                     Š The part of the box that we see or touch is its surface or
                      face. Paste a star on each face of the box.


                         How many stars have you used? ________
                     Š The line where two faces of the box meet is called the edge.
                      Glue the colourful strips and put it along all its edges.


                         Are the lengths of all the strips the same? ________

                         How many strips have you used in all? ________
                     Š The meeting point of the edges is called a corner or vertex.
                      (The plural of vertex is vertices.) Fix a decorating stone on each

                      of the vertices.

                         How many decorating stones have you used in all? ________

                     Š Wow! Your gift box is so beautiful.

                         Thus, you observe that a cuboid/cube has ________ faces,
                         ________ edges and ________ vertices.








                                                                                                             Logical Thinking
                                                                                                   Creative Thinking
                      Challenge Question
                 1.  Using the dots shown here, how many rectangles can you create?
                     [Hint: A square is also a type of rectangle.]

                 2.  Look at the pattern carefully and figure out the missing number.


                       4        3               5        4               6         5
                           10                       17                      ____

                           2                         3                        4




              Mathematics-2                                                                                         151
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