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jumlah perbandingan = 6+3+1 = 10
jumlah sudut segitiga = 180°
∠A = 6/10 x 180° = 108°
∠B = 3/10 x 180° = 54°
∠C = 1/10 x 180° = 18°
segitiga tumpul karena ∠A =108°