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56 = x + (3x+3) + (4x-3)
56 = 8×
7 = x
Substitusikan 7 kedalam x sehingga didapatkan 7cm,24cm, dan 25cm
Luas segitiga = 0,5 x a x t
Luas segitiga = 0,5 x 7 x 24
Luas Segitiga = 84 cm