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    E:\Working\Focus_Learning\Math_Genius_2_(09-10-2023)\Open_Files\Chap_08
                   \ 17-Nov-2023  Bharat Arora   Proof-6                                    Reader’s Sign _______________________ Date __________

                                       Learning by Doing

                  Objective: Wrapping and decorating a gift box.

                  Materials required:

                  An empty shoebox or any other cubical/cuboidal box, a sheet of gift wrapping paper,

                  few stars, colourful ribbon/paper strip, some decorating stones and glue.

                  Procedure:

                          First, cover the box with a wrapping paper.

                          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? ________
                          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 strips same? ________

                             How many strips have you used in all? ________

                          The meeting point of the edges is called 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? ________

                          Wow! Your gift box is so beautiful.

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

                          Brain Sizzlers

                     1.  How many rectangles can you make by joining the dots given here?
                         [Hint: Square is also a type of rectangle.]

                     2.  Observe the pattern and find the missing number.

                           4        3               5        4               6         5
                               10                       17                      ____

                               2                         3                        4

                  Mathematics-2                                                                                         151

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