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Verified answer
Bab Bangun DatarMatematika SMP Kelas VII
Persegi panjang
p - l = 6
p = l + 6
keliling = 60
2 . (p + l) = 60
l + 6 + l = 60 : 2
2l = 30 - 6
l = 24 : 2
l = 12 m
p = l + 6
= 12 + 6
= 18 m
Luas = p . l
= 18 . 12
= 216 m²