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ac = x
bc = 2(x - 8)
kllng = ab + ac + bc
72 = x - 8 + x + 2(x - 8)
72 = x - 8 + x + 2x - 16
72 = 4x - 24
96 = 4x
x = 24
ab = x - 8 = 24 - 8 = 16cm
ac = x = 24cm
bc = 2(x - 8) = 2(24 - 8) = 32cm
ab : ac : bc
16 : 24 : 32 (sama2 dibagi 8)
2 : 3 : 4