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Kelas 7 MatematikaBab 4 - Persamaan dan Pertidaksamaan Linear Satu Variabel
p = 42 cm
l = p - 14
l = 42 - 14
l = 28 cm
Keliling = 2 . (p + l)
Keliling = 2 . (42 + 28)
Keliling = 2 . 70
Keliling = 140 cm
Keliling = 14 dm