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    E:\Working\Orange_Education\Math_Genius_2\Open_Files\Chap_08
                   \ 26-Sep-2025  Bharat Arora   Proof-10                                   Reader’s Sign _______________________ Date __________

                   Sphere: The figure given below is a sphere.                    Some spherical objects are

                                            •  A sphere has one curved  shown below.

                                                face.
                                            •  It does not have any edge

                                                or vertex.

                        activity
                   touch and tell. Who am I?                                                                   Experiential Learning

                   Place different wooden solid  shapes  or objects with  variations  in
                   faces, corners and edges. Blindfold a child and ask them to pick an
                   object as per the details given by other children.
                   For  example,  a student may be asked to  find an object with  one
                   vertex.

                   Similarly, continue with other objects and other students.

                          Think Tank                                                                             Logical Thinking

                         Name objects which have:
                         1.  no vertices     2.  1 vertex        3.  2 edges         4.  6 faces

                           Practice time 8c

                  1.  Look at your surroundings and name:

                       (a)  one cubical object.              _______  (b)  one spherical object.  _______

                       (c)  one cylindrical object.          _______  (d)  one cuboidal object.               _______

                  2.  How many faces, vertices and edges do these solid shapes have?

                          Solid shape           Cube          Cuboid           Cone          Cylinder         Sphere

                              Faces

                            Vertices

                             edges

                  Mathematics-2                                                                                         145

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