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    E:\Working\Brother_Education\Preparatory_Stage_Maths-3_(11-09-2024)\Open_Files\CHAP_08
                 \ 02-Nov-2023                      Sonia Suyal   Proof-1                     Reader’s Sign _______________________ Date __________

                  Symmetry

                  Eva is making a card for their parents on the occasion of their wedding anniversary.

                  For this, she takes a sheet of paper and first folds it into half. Next she marks a curve and

                  cuts out a piece. When she opens it, she gets a heart shape as shown here.

                  She also needed an envelope, so she drew

                  an outline on a sheet of paper and cut it out
                  along the boundary, as shown here.

                  Then, she folds and fixes the triangular flaps.

                  Now, her envelope is ready.

                  She writes the wishes on the card, decorates and keeps it into the
                  envelope.
                                                                                                                  Line of
                  In Eva's work, we have noticed that the figures or shapes used are                            symmetry
                                                                                                            Happy
                  identical on both sides.                                                                Anniversary
                  Such figures, which can be divided into two exactly identical parts are

                  said to be symmetrical about the dividing line.

                  The dividing line is called the line of symmetry.
                  Identifying Symmetrical Figures using a mirror

                  Take a triangular, rectangular and a circular

                  piece of paper and fold them into halves.

                  Cut them along the line of symmetry.

                  Mathematics-3                                                                                         131

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