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    E:\Working\Orange_Education\TouchPad_Maths_4\Open_Files\Chap_07\Chap_07
                 \ 10-Nov-2025  Bharat Arora   Proof-8                                     Reader’s Sign _______________________ Date __________

                Types of Polygons

                A polygon is named according to the number of sides it has.
                Look at the following polygons.

                             3 sides                 4 sides                 5 sides                6 sides

                            Triangle             Quadrilateral             Pentagon                Hexagon

                             7 sides                 8 sides                 9 sides                10 sides

                           Heptagon                 Octagon                Nonagon                 Decagon

                                                                                                      21 st
                          Activity                                                                  Century   #Art Integration
                                                                                                     Skills

                    Let us have some fun with straws of different sizes and clay.

                    First, make a triangle with straws of different sizes and clay.
                       y What kinds of angles does a triangle have? ___________
                       y Does the shape of the triangle change if we gently push one
                       of its sides? ___________

                    Next, make a rectangular and a square shape.

                                                                             Square
                                                     Rectangle

                       y What kinds of angles do you see in these shapes? ___________
                    Now, gently push one of the sides of the rectangle or square.

                       y What  has happened to  the  angles  of the  new shape?  Are they  still  right  angles?
                       What types of angles have been formed?

                       122       Mathematics 4

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