code: def isIsosceles(self):
          '''
          True iff two side lengths are equal, boolean.
          '''
          return (self.a == self.b) or (self.a == self.c) or (self.b == self.cf isIsosceles(self):
          '''
          True iff two side lengths are equal, boolean.
          '''
          return (self.a == self.b) or (self.a == self.c) or (self.b == self.c)
docs: True iff two side lengths are equal, boolean.