from abc import ABC, abstractmethod
class Figura(ABC):
    @abstractmethod
    def area(self):
        pass
    @abstractmethod
    def perimetro(self):
        pass
class Cuadrado(Figura):
    def __init__(self,lado):
        self.lado=lado
    def area(self):
        return(self.lado*self.lado)
    def perimetro(self):
        return(4*self.lado)
c=Cuadrado(5)
print(c.area())
print(c.perimetro())

