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Tahap Pembuktian


                        Buktikanlah gambar persegi panjang di bawah yang memiliki panjang 22 cm dan lebar


                        10 cm yang merupakan                              bangun datar layang-layang.
                                                         2

                                                                2



                                      p =                   = 22 cm
                                                    2





                                                    = 10 cm
                            2
                        Tentukanlah            dan luas layang-layang tersebut!

                        Penyelesaian:  .............................................................................................................
                         ....................................................................................................................................
                         ....................................................................................................................................
                         ....................................................................................................................................

                         ....................................................................................................................................
                         ....................................................................................................................................
                         ....................................................................................................................................

                           Tahap Menarik Kesimpulan

                        Berdasarkan kegiatan tersebut apa yang dapat ananda simpulkan?


                                               Keliling layang-layang adalah  ............................................

                                                .............................................................................................
                                                .............................................................................................

                                               Sehingga diperoleh rumus keliling layang-layang:

                                               K =   +   +   +

                                               Dan luas layang-layang adalah ............................................
                                                .............................................................................................
                                                .............................................................................................

                                               Sehingga diperoleh rumus luas layang-layang:

                                                       
                                               L =
                                                       



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