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largo b = x cm
perímetro = 32 cm
Perímetro = 2a + 2b
32 = 2(4) + 2x
32 = 8 + 2x
32 - 8 = 2x
24 = 2x
24
x = --------- = 12 cm el largo
2
Área = ancho * largo = 4 * 12 = 48 cm ²