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    E:\Working\Orange_Education\TouchPad_Maths_4\Open_Files\Chap_10\Chap_10
                     \ 10-Nov-2025  Bharat Arora   Proof-8                                    Reader’s Sign _______________________ Date __________

                                                                                                           HOTS

                                                                                                  21 st
                                                                                                 Century   #Computational Thinking
                                                                                                  Skills
                        1.  Using geo dotted paper, form the letters E, H, and L with the stated perimeters.
                           a.  E → 22 units                b.  H → 24 units                c.  L → 20 units

                       2.  Anita folded a rectangular piece of paper in half three times to make a square.
                           If one side  of the  final
                           square was 2 cm, what

                           was the area of the
                           piece of paper she started with?

                                                      Fun                  Activity               21 st   #Experiential Learning,
                                                                                                 Century
                                                                                                  Skills  #Subject Enrichment
                                                              Perimeter Game

                        Play this game with a friend or classmate using dice, coloured paper or cardboard
                        tiles, pencils or markers, and a score sheet.
                          •  Each player rolls the dice to determine how many
                             cardboard tiles to use to build their starting shape.
                          •  Use the tiles to create a shape and calculate its
                             perimeter.  For example, a shape  might  have a                               1 1 1
                             perimeter of 10 units.                                                      1         1
                          •  Take turns rolling the dice. On each turn:                                    1 1  1  1 1
                             –   if the number is even, add that many tiles to                       Perimeter = 10 units
                                your shape and recalculate the perimeter.                                  1 1 1
                                Example: After  adding  tiles, the perimeter                             1         1
                                becomes 14 units.                                                        1         1
                             –   If  the number is  odd,  remove  that  many  tiles                      1  1    1  1
                                (carefully!) and recalculate the perimeter.                                 1  1  1
                                Example: After removing tiles,  the perimeter                        Perimeter = 14 units
                                becomes 8 units.                                                            1 1 1
                          •  After each turn, write down the new perimeter on                             1         1
                                                                                                            1 1 1
                             your score sheet.                                                        Perimeter = 8 units
                          •  Play for 5–6 rounds.
                             At the end of the game, the player with the highest perimeter wins!

                                                                                                                 179
                                                                                            Perimeter and Area

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