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Kelas 7 MatematikaBab Perbandingan dan Aritmatika Sosial
Keliling 1 : keliling 2
= (2 x (4 + 6)) : (2 x (6 + 8))
= (2 x 10) : (2 x 14)
= 20 : 28
= (20 : 4) : (28 : 4)
= 5 : 7