Rumus Luas & Keliling Segitiga

Rumus Segitiga Keliling & LuasKeliling : AB + AC + BC
Luas Segitiga : 1/2 x alas (BC) x tinggi AB

Contoh :

Mencari Keliling
Dik : Panjang AB = 5 cm
         Panjang AC = 2 cm
                                               Panjang BC = 1 cm
                                      Dit : Keliling.....?
                                      Penyelesaian :
                                      Keliling = AB + AC +BC
                                                    = 5 cm + 2 cm + 1cm
                                      Keliling = 8 cm

                                      Mencari Luas
                                      Dik : Alas = 30 cm
                                               Tinggi = 20 cm
                                      Dit : Luas......?
                                      Penyelesaian :
                                      Luas Segitiga = 1/2 x alas x tinggi
                                                             = 1/2 x 30 cm x 20 cm
                                      Luas Segitiga = 300 cm