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Verified answer
Misalkan :sisi pertama = s1
sisi kedua = s2
s1 : s2 = 3x : 7x
s2 - s1 = 16 cm
7x - 3x = 16
4x = 16
x = 4
s1 = 3x = 3×4= 12 cm
s2 = 7x = 7×4 = 28 cm
jadi, panjang sisi sisi tersebut adalah 12 cm dan 28 cm