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LANGKAH-LANGKAH :                                 LUAS DAERAH
1. Gambarlah dua buah segitiga siku-
                                                      SEGITIGA
   siku yang konkruen pada kertas
   petak !

2. Potong menurut sisi-sisinya !             t

                                                      a
3. Tentukan mana sisi alas dan tinggi
   segitiga !

4. Susun kedua segitiga tersebut                   KESIMPULAN
   sehingga membentuk
   persegipanjang !                        Jika rumus luas persegipanjang adalah,
                                             L = p × l, maka luas 2 segitiga adalah,
5. Karena dua segitiga sudah berbentuk
                                             L = a × t, sehingga diperoleh rumus luas
   persegipanjang, maka :
                                             segitiga :
                  p
                  ?
  alas segitiga = …. persegipanjang, dan
                    l
                    ?
  tinggi segitiga = …. persegipanjang              1
                                             L=    2 (a × t)

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Luas segitiga siku siku

  • 1. LANGKAH-LANGKAH : LUAS DAERAH 1. Gambarlah dua buah segitiga siku- SEGITIGA siku yang konkruen pada kertas petak ! 2. Potong menurut sisi-sisinya ! t a 3. Tentukan mana sisi alas dan tinggi segitiga ! 4. Susun kedua segitiga tersebut KESIMPULAN sehingga membentuk persegipanjang ! Jika rumus luas persegipanjang adalah, L = p × l, maka luas 2 segitiga adalah, 5. Karena dua segitiga sudah berbentuk L = a × t, sehingga diperoleh rumus luas persegipanjang, maka : segitiga : p ? alas segitiga = …. persegipanjang, dan l ? tinggi segitiga = …. persegipanjang 1 L= 2 (a × t)