text: class Circle:
      def __init__(self,radius):
          self.radius = radius
  
      def circunference(self):
          return 2*(3,1415)*self.radius
      
      def area(self):
          return 2*(3,1415)*(self.radius**2)
  
  class Triangle:
      def __init__(self,a,base,c,height):
          self.a = a
          self.b = base
          self.c = c
          self.height
  # in this function we'll only classify the thiangle that can be possible to classify by your side measures
      def kind(self):
          if self.a == self.b == self.c :
              print('Equilateral triangle')
          elif (self.a**2 + self.b**2 == self.c**2) or self.a**2 + self.c**2 == self.b**2 or self.c**2 + self.b**2 == self.a**2:
              print('Right triangle')
          elif self.a ==self.b != self.c or self.a ==self.c != self.b or self.b == self.c != self.a:
              print('Isosceles triangle')
          
          def area(self):
              return (self.base*self.height)/2
  
          def perimeter(self):
              return (a+base+c)/2