class Shape:
  def area_shape(self,length1=0,length2=0,length3=0):
    pass
  def perimeter_shape(self,length1=0,length2=0,length3=0):
    pass
 
class Rectangle(Shape):
  def area_shape(self, width, length):
    area = width * length
    print(area)
 
  def perimeter_shape(self, width, length):
    perimeter = 2*(width + length)
    print(perimeter)
 
class Triangle(Shape):
  def area_shape(self, width, height):
    area = 0.5*(width * height)
    print(area)
 
  def perimeter_shape(self, length1,length2,length3):
    perimeter = length1 + length2 + length3
    print(perimeter)
 
 
triangle = Triangle()
triangle.area_shape(4,3)
triangle.perimeter_shape(4,3,5)
 
rectangele = Rectangle()
rectangele.area_shape(4,6)
rectangele.perimeter_shape(4,6)

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