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area = lado²
49 = lado²
lado = √49 = 7
Perímetro = 4*lado = 4*7 = 28
Respuesta: 28 cms
Entonces: L = raiz cuadrada del área.
L = raiz cuadrada de 49 cm2 ; L = 7 cm
ahora: p = 4 L
entonces : p = 4 (7 cm.) p = 28 cm