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    E:\Working\Brother_Education\Preparatory_Stage_Maths-3_(11-09-2024)\Open_Files\CHAP_07
                 \ 02-Nov-2023                      Sonia Suyal   Proof-1                     Reader’s Sign _______________________ Date __________

                          Encapsulate
                       math
                                                                geOmetry

                          Simple Geometrical Concepts                Plane Shapes                     Solid Shapes

                        Point               Line                                                Cube           Cuboid
                       P   Q                                                                     Face             Face
                       •   •                                    triangle      rectangle
                                                                                                           Edge
                           • R                                  A   Vertex  A  Vertex  D    Edge                 Corner
                                types of line                          Side                          Corner
                                                                                               Cylinder        Cone
                           Straight Lines                    B           C   B   Side  C
                                              Curved Lines                                         Plane face      Vertex
                    Horizontal Vertical Slanting                                                   Curved face     Curved face
                                                                 Square         Circle
                                                              A      D                             Edge    Plane     Edge
                                                                       Side                                face
                                                                      Vertex   Centre          Sphere       Hemisphere
                                                                                  O                         Edge  Plane face
                         ray            Line Segment          B      C
                                                Y
                      A      B
                                           X                   Line drawings of 3d objects                       Curved face
                                          Line segment  XY
                                             XY                 Draw a   Draw another             Plane and Curved Surface
                                                               square on   square as   Join the
                                                               the sheet:  shown:  corners:     •  Some objects
                                  diagonals                                                       have only the
                                                                                                  plane surface.
                 A A  A    D D  D          P P   P S S  S                                       •  Some objects
                                                                                                  have only
                                                                                                  the curved
                                                                       Tangram                    surface.
                 B B  Rectangle Rectangle  C  Q Q Square Q R R  R
                           C C
                      B
                     Rectangle
                                               Square
                                                   Square
                The diagonals AC and BD of a
                                       The diagonals PR and QS of a square
               The diagonals AC and BD of a   The diagonals PR and QS of a squar e   7-pieces Tangram  •  Some objects
                    The diagonals AC and BD of a
                                           The diagonals PR and QS of a square
                rectangle are equal in length.
                                            are equal in length.
                     e equal in leng
               rectangle ar rectangle are equal in length.  are equal in length.  3  4            have both
                            th
                                                are equal in length.
                              .
                                                                          6                       the plane
                                                                         5   2
                                                                       7                          and curved
                                                                         1                        surface.
                         Mental Maths
                      1.  What is the difference between a ray and a line segment?
                      2.  How many rectangles are there in the adjacent figure?
                      3.  Name the solid that has no edge?

                      4.  How many triangles are there in the adjacent figure?

                  Mathematics-3                                                                                         127

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