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              \\November 1, 2023 12:58 PM   Bharat Arora   P-2          Reader _________________________   Date: ___________________





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                1.  Identify the shape and fill in the blanks.

                    (a)  A solid with one curved face, 1 circular face and 1 corner is a  _____________.

                    (b)  A solid with 12 edges and 6 rectangular faces is a                       _____________.


                    (c)  A 2-dimensional shape without any edge is a                              _____________.
                2.  Write the name of two real-life objects that have the shape of a:


                    (a)  cube       ______________________, ______________________

                    (b)  cone       ______________________, ______________________


              Basics of Geometry

                                                                          Knowledge Desk
              Let us recall  basic  concept of geometry
              learnt in the previous class.                             The word Geometry is derived from the
                                                                        Greek words ‘Geo’, means ‘Earth’ and ‘metron’
              Point                                                     means ‘Measurement’. Thus, the word
                                                                        ‘Geometry’ means ‘Earth’s measurement’.

              A small dot made with a sharp pencil or
              a pen marked on a paper, the tip of a needle, etc. represents a point.

              A point shows an exact location.

              It has no length, breadth or thickness.                                                     Q

              Point is denoted by a capital letter.
                                                                                               P                     A
              For example, Q, P and A are points.

              Line

              A straight  path  which  goes in  both  directions  indefinitely            A                       B

              is called a line.

              Thus, a line has no end points. For naming a given line, we consider any two points
              lying on it. For example, if A and B are any two points on a line, we say it ‘line AB’

              and the line is denoted by  AB .

              ray

              A ray is  a  part  of a  line  which  goes on  only  in  one              A                         B

              direction.  A ray has  one end  point. For example,  in  the
              given figure, AB is a ray which can be written as AB  , where A is its initial

              point. Sunray is an example of ray.


              Mathematics-4                                                                                          149
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